Chicago Bulls' Taj Gibson celebrates after a basket against the Atlanta Hawks during Game 5 of their NBA Eastern Conference second round playoff basketball game in Chicago, May 10, 2011. [Photo/Agencies]

A sign is seen on a road as floodwaters slowly rise in Holly Grove, Arkansas May 10, 2011. The Mississippi River may have reached its highest level at Memphis early on Tuesday just inches below the all-time record, according to the National Weather Service, as a wall of water moved south toward the Gulf of Mexico. [Photo/Agencies]