French riot police bulldoze a makeshift camp for undocumented migrants in the northern Channel port of Calais and detain 278 people, mostly young men from Afghanistan, Pakistan, and Iraq, who lived in the camp, known as “the jungle,” while waiting for the opportunity to jump a ferry or train to the U.K.

Addressing world leaders gathered for a U.N. summit on climate change, President Obama declares that the U.S. is “determined to act,” and encourages unity on the issue, saying the world “cannot allow the old divisions that have characterized the climate debate for so many years to block our progress.”

China bans foreign tourists from Tibet ahead of the 60th anniversary of Communist rule in the country, which will be celebrated on October 1 with a military parade, fireworks, and a speech by President Hu Jintao.

Honduran security forces use tear gas to break up demonstrations outside the Brazilian embassy in the Honduran capital Tegucigalpa, where deposed President Manual Zalaya has been since his surprise return to the country yesterday.