A photographer takes a picture of a construction worker crossing the finish line,at the London 2012 Olympic stadium, London, Tuesday, March 29, 2011. The last piece of turf was laid Tuesday at the Olympic Stadium, symbolizing the completion of building work on the 80,000-seat flagship venue for the 2012 London Games. Former Olympic sprinter Frank Fredericks used a shovel to lay down the symbolic last piece of grass on the infield, 16 months before next year's games. (AP Photo/Tom Hevezi)