Fortnight in pictures - Feb 28 to March 13

US President Barack Obama (third from left) and wife Michelle participate in a march across the Edmund Pettus Bridge in Selma, Alabama, on March 7. The event comes on the 50th anniversary of the 'Bloody Sunday' march at the bridge, where police and state troopers beat and used tear gas against peaceful marchers who were advocating against racial discrimination at the voting booth. Also seen are US Representative John Lewis (D-GA) (second from left), former first lady Laura Bush (second from right) and former president George W Bush (extreme right)