The ordinary man who became the Khmer Rouge’s jailer

Never forget: the terrifying normality of Comrade Duch -- by the prisoner who survived.

The head of Tuol Sleng, the Khmer Rouge prison where more than 15,000 men, women and children were tortured and killed, has just been sentenced to 35 years in jail (though he is expected to serve just 17).

Kaing Guek Eav, or Comrade Duch, is the first senior Khmer Rouge cadre to be tried and convicted by an international tribunal in the Cambodian capital, Phnom Penh. The case has brought the barbarity and callousness of the Pol Pot regime -- which caused the death of roughly a quarter of the country's population between 1975 and 1979 -- once more to the world's notice.

It would be easy to paint Duch as a monster. At one level, clearly he is. But to lay the blame for the atrocities of the Khmer Rouge at the door of a few "evil" people is too simplistic. Prime Minister Hun Sen (himself ex-Khmer Rouge) would rather the legal proceedings go no further than the current five cases -- which is an acknowledgement that the layers of complicity, whether voluntary or forced, run deep and wide. "If as many as 20 Khmer Rouge are indicted to stand trial and war returns to Cambodia, who will be responsible for that?" he asked last year.

Hun Sen may well be justified in fearing what could be unearthed, both because of the prominence of the politicians who could be fingered and for the effect delving into the past could have on a country that needs to preserve and build on shallow foundations of reconciliation. (It is only 13 years since different armed forces last fought each other in the capital).

But another way of looking at the larger picture lies not in levelling further accusations, but in trying, somehow or other, to understand how so many people could have acted so terribly.

For the good of Cambodia

One man in particular is well placed to comment. François Bizot is a French scholar who worked at the Angkor Conservation Office in the early 1970s. In October 1971 he was captured and, accused of being a CIA spy, held by the Khmer Rouge at Camp M13 in the far north of the country. The overseer of the camp was . . . none other than Comrade Duch.

Bizot wrote a remarkable memoir of his time in the camp and of the subsequent fall of Phnom Penh to the hardline Maoist regime, which he witnessed. "The Gate" was considered to contain such valuable insights that he was the first witness called to testify in Duch's trial when it began in April last year.

Bizot recalled that initially he thought those who commit unspeakable crimes must be "of a different species", but he came to realise that the truth was "much more tragic, much more frightening". Duch was "a man who resembled others", "polite", "a tireless worker", "a Communist-Marxist ready to lose his life if necessary for his country and for the revolution".

"The humanity that is his own," said Bizot, "was obviously not an obstacle to the killings he perpetrated." But "the final goal of his commitment was the good of Cambodia and fighting injustice".

The ambiguity that has haunted Bizot ever since is that he owes his life to this man. It was Duch, the jailer of Tuol Sleng, who wrote the report to his superiors in "Angkar", the party's Big Brother-like organisation, that secured the Frenchman's release. No other westerner is known to have survived imprisonment by the Khmer Rouge.

"Trying to understand is not to forgive," said Bizot. No, not in this case, it isn't. But trying to understand is necessary if we are to remember that "the banality of evil" was not confined to Hitler's Germany. (You can read a comparison of the Khmer Rouge with the Nazis in Der Spiegel here.)

To make a monster of Duch is almost to take away his responsibility. A psychiatric report on him commissioned by the court concluded that the prisoner was medically and mentally normal; he could, in theory at least, one day be reintegrated into society.

It is the fact that Duch, and countless others in Cambodia, were so ordinary which makes their crimes so chilling. That is what we should try to understand. And if we cannot, if the enormity of their wickedness is ultimately beyond comprehension -- then it is certainly what we should remember.

Sholto Byrnes is a Contributing Editor to the New Statesman
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Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.