US winner in $640m Mega Millions lottery draw
31 March 2012 Last updated at 10:51 BST
At least one ticket - bought in Maryland - is a winner in the $640m (£400m) Mega Millions lottery, officials say, after the biggest jackpot in history.
Earlier, queues snaked out of shops from coast to coast as people took a punt at the biggest jackpot in world history.
Jonathan Blake reports from Washington.