Republican caucuses The Republican caucuses in the state of Maine finish with Mitt Romney finishing just ahead of Ron Paul.
Lisbon Hundreds of thousands of people march in the Portuguese capital Lisbon against austerity measures.
Stephen Harper Canadian Prime Minister Stephen Harper meets privately with Chongqing party boss Bo Xilai. The latter is currently embroiled in the Wang Lijun affair in what is rumoured to be an intense political struggle.
Nuclear reactors Thousands of people march in Japan against the resumption of nuclear reactors that were closed after the Fukushima disaster last year.
Burma Burmese protest leader U Gambira is released by authorities in Yangon after being held overnight.
Iran Iranian president Mahmoud Ahmadinejad is to make an "important nuclear announcement" within days.
The Sun Five journalists from "The Sun" are among eight people arrested in connection with allegations of corrupt payments to police. News International boss Rupert Murdoch says he is committed to the newspaper.
Arid Uka Arid Uka, an Islamic extremist, is convicted in Germany of murdering two U.S. soldiers and injuring another two in a shooting at Frankfurt Airport last year.
Mark Lyall Grant Sir Mark Lyall Grant, the Permanent Representative of the United Kingdom to the United Nations, describes claims by Argentina that the United Kingdom is militarising the Falkland Islands as "manifestly absurd".
Whitney Houston American singer and actress Whitney Houston dies suddenly at the age of 48 at the The Beverly Hilton.
Israeli Air Force The Israeli Air Force conducts four air strikes in the Gaza Strip with claims that two people were injured.
Three people including an Australian journalist, an American student and their Egyptian guide are arrested in the city of El-Mahalla El-Kubra for allegedly offering inducements to people to join.
Activists in Egypt mark the first anniversary of the overthrow of former President Hosni Mubarak in the 2011 Egyptian Revolution with a strike and a day of civil disobedience.
Human rights activist Nabeel Rajab says two Americans have been detained by Bahraini security forces and US Embassy is looking into the reports.
Bahrain security forces tear-gas dozens of demonstrators, injuring three, ahead of the anniversary of the uprising.
At least three people are killed and several wounded in Tripoli, Lebanon, in clashes between supporters and opponents of Syrian president Bashar al-Assad.
A draft resolution is circulated by Saudi Arabia at the United Nations General Assembly calling for an end to the violence, as the Syrian city of Homs is besieged by the Syrian army.