The Week So Far

1. Europe
Financial sanctions against the Libyan defector Mousa Kousa were dropped on 4 April to encourage the defection of other high-profile Libyans. Kousa, who fled to Britain on 30 March, had his assets unfrozen, despite being wanted for questioning over his involvement in the 1988 Lockerbie bombing.

2. North America
President Barack Obama launched his re-election campaign on 4 April on Twitter, Facebook and Barackobama.com. Obama tweeted: "Today, we're filing papers to launch our 2012 campaign." It is estimated that it will cost more than $1bn.

3. Middle East
The UN investigator Richard Goldstone has distanced himself from a report into alleged Israeli war crimes during Israel's attack on Gaza in 2008. Goldstone wrote in a Washington Post op-ed: "If I had known then what I know now, the Goldstone report would have been a different document." The South African judge said that "civilians were not intentionally targeted as a matter of policy" by Israeli forces.

4. Latin America
A former carnival singer was elected president of Haiti after winning 68 per cent of the vote in a run-off election on 20 March. Michel Martelly, 50, also known as "Sweet Micky" or "Tet Kalé" (bald head), admits to having smoked marijuana and crack cocaine before he became a politician.

5. Africa
Prosecutors in Zambia have dropped charges against two Chinese managers who shot 13 coal miners in a wage protest in October last year. Critics claim that prosecutors dropped the charges in order to avoid damaging Chinese investment in the African state, which amounts to $1bn per year.

6. Asia
Floods in Thailand have killed 53 people and forced 40,000 to flee their homes. Unseasonably wet weather caused mudslides and flash-flooding, which swept away bridges, roads and buildings. The Thai government has pledged £120m to help flood victims.

7. Technology
Google has entered a $900m bid for the patent portfolio of the bankrupt Canadian telecoms company Nortel Networks. The bid focuses on Nortel's
6,000 technology patents and Google hopes that it will "create a disincentive" to sue the internet giant.

8. Health
People who work long hours are at greater risk of heart disease, according to UCL researchers. Those who work more than 11 hours a day run a 67 per cent higher risk than those working eight.

9. People
The late David Foster Wallace's unfinished novel, The Pale King, will be published on 15 April, the day US tax returns have to be filed. The novel is based on the lives of tax inspectors in Illinois.

10. Business
Four orders of nuns have called on Goldman Sachs executives to rein in excessive pay for the investment bank's executives. The Sisters of Saint Joseph of Boston, Notre Dame de Namur, St Francis of Philadelphia and the Benedictine Sisters of Mount Angel will issue the proposal at Goldman's forthcoming annual general meeting.