Photo taken on March 25, 2013 shows a view of the snow-covered South Lawn of the White House in Washington D.C., capital of the United States. (Xinhua/Zhang Jun)

A tourist walks past a snow-covered soldier statue at the National Mall in Washington D.C., capital of the United States, on March 25, 2013. (Xinhua/Zhang Jun)

A family walk amid snowfall near the Washington Monument at the National Mall in Washington D.C., capital of the United States, on March 25, 2013. (Xinhua/Zhang Jun)