In a second video posted Wednesday, Scott Brown supporters' war whoops are heard as Brown criticizes Elizabeth Warren's claims of Native American heritage. Brown apologized for staff members shouting war whoops and performing tomahawk chops during a rally days earlier in Boston's Dorchester neighborhood.
Israeli scientists participate in an experiment simulating a mission to Mars, at the D-MARS Desert Mars Analog Ramon Station project of Israel's Space Agency, Ministry of Science, near Mitzpe Ramon, Israel, Feb. 18.
Democrats launch their case for President Obama's re-election as his nominating convention opens on Tuesday. They plan to use the convention to highlight the party's diversity, featuring black, young and Hispanic speakers to appeal to the voting blocs that helped Obama to a comfortable victory in 2008.