2010 was one of the deadliest years on record for coral reefs. The Caribbean Sea just outside the Cancún climate conference offers evidence of global warming's negative effect.
For residents of Haiti, still struggling to recover from last January's destructive earthquake and more recently trying to cope with an outbreak of cholera, the country dodged a bullet.
Plane crashes: AeroCaribbean Flight 883 was en route from the eastern city of Santiago de Cuba to the capital when it reported an emergency at 5:42 p.m. local time Thursday, then lost contact with air traffic controllers.
Hundreds of thousands of Haitians lack access to clean water in Port-au-Prince, a situation expected to worsen after tropical storm Tomas makes landfall on Friday.
Ethiopian Jewish women pray during a ceremony for the traditional 'Sigd' holiday in Jerusalem. The festival, unique to the Ethiopian Jewish community, symbolizes the community's reacceptance of the Torah, led by Ezra the Scribe before the construction of the second Jewish temple.
Some 1.3 million Haitians in the capital's tent cities have nowhere to go as potential hurricane Tomas approaches, even as 120,000 homes sit vacant and easily repairable.
Storm Tomas was downgraded today to a tropical depression, but forecasters expect the storm to pick up speed before it touches down on Haiti on Friday.
Aid groups and the Haitian government try to prepare as tropical storm Tomas threatens to regain hurricane strength. More than 1 million people live in tents on the rubble-strewn island nation.
US Sen. John McCain (R) of Arizona and his wife, Cindy McCain, address the media as they leave a polling station in Phoenix as Apollo, a dog owned by McCain's son Jimmy, licks the camera.