Pedestrians walk in snowstorm in Washington D.C., the United States, Jan. 21, 2014. Thousands of flights were canceled, students got an extra day off from school or were being sent home early, and the federal government closed its offices in the Washington area Tuesday as a winter storm bore down on the East Coast. (Xinhua/Yin Bogu)  

A man walks past the Capitol in Washington D.C., the United States, Jan. 21, 2014. Thousands of flights were canceled, students got an extra day off from school or were being sent home early, and the federal government closed its offices in the Washington area Tuesday as a winter storm bore down on the East Coast. (Xinhua/Yin Bogu)

A man walks on a snow-covered street near the Capitol in Washington D.C., the United States, Jan. 21, 2014. Thousands of flights were canceled, students got an extra day off from school or were being sent home early, and the federal government closed its offices in the Washington area Tuesday as a winter storm bore down on the East Coast. (Xinhua/Yin Bogu)

 A woman carries her luggage in snow at a park in Washington D.C., capital of the United States, Jan. 21, 2014. A strong winter storm struck most of the U.S. East Coast on Tuesday with heavy snow and bitter cold, creating travel woes that led to the cancellations or delays of flights. (Xinhua/Zhang Jun)

A man walks in snow at a park in Washington D.C., capital of the United States, Jan. 21, 2014. A strong winter storm struck most of the U.S. East Coast on Tuesday with heavy snow and bitter cold, creating travel woes that led to the cancellations or delays of flights. (Xinhua/Zhang Jun)

A statue is covered with snow near the Capitol in Washington D.C., the United States, Jan. 21, 2014. Thousands of flights were canceled, students got an extra day off from school or were being sent home early, and the federal government closed its offices in the Washington area Tuesday as a winter storm bore down on the East Coast. (Xinhua/Yin Bogu)

A man rides a bicycle on the snow-covered National Mall near the Capitol in Washington D.C., the United States, Jan. 21, 2014. Thousands of flights were canceled, students got an extra day off from school or were being sent home early, and the federal government closed its offices in the Washington area Tuesday as a winter storm bore down on the East Coast. (Xinhua/Yin Bogu)

Pedestrians walk on a snow-covered street near the Capitol in Washington D.C., the United States, Jan. 21, 2014. Thousands of flights were canceled, students got an extra day off from school or were being sent home early, and the federal government closed its offices in the Washington area Tuesday as a winter storm bore down on the East Coast. (Xinhua/Yin Bogu)