This Monday, Nov. 11, 2013 file aerial photo taken from a Philippine Air Force helicopter shows the devastation of the first landfall by typhoon Haiyan in Guiuan, Eastern Samar province, central Philippines. Haiyan slammed the island nation with a storm surge two stories high and some of the highest winds ever measured in a tropical cyclone. (AP)

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This Monday, Nov. 11, 2013 file aerial photo taken from a Philippine Air Force helicopter shows the devastation of the first landfall by typhoon Haiyan in Guiuan, Eastern Samar province, central Philippines. Haiyan slammed the island nation with a storm surge two stories high and some of the highest winds ever measured in a tropical cyclone. (AP)