People ride a paddleboat as cherry blossom trees begin to bloom adjacent to the Tidal Basin and Jefferson Memorial on the National Mall in Washington, DC, on March 15, 2012. The National Park Service forecasts peak bloom between March 20 and 23, one of the earliest years on record due to warmer than average temperatures. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)