Snow covers tulips blooming in Lafayette Park across from the White House after a rare April snowfall hit the nation's capital in Washington, April 7, 2007. REUTERS/Jim Bourg (UNITED STATES)
Snow covers tulips blooming in Lafayette Park across from the White House after a rare April snowfall hit the nation's capital in Washington, April 7, 2007. REUTERS/Jim Bourg (UNITED STATES)
In this photo released by the U.S. Coast Guard, the Coast Guard Cutter Healy breaks ice to support scientific research in the Arctic Ocean near Barrow, Alaska, Saturday, July 22, 2006. Arctic sea ice this winter just missed setting the record for fewest square miles covered since monitoring by satellite began, according to University of Colorado researchers. (AP Photo/U.S. Coast Guard, Prentice Danner)