A night time photograph made by an International Space Station Expedition 25 crewmember shows the bright lights of Cairo and Alexandria, Egypt on the Mediterranean coast as well as the Nile River and its delta which stand out clearly in this image released by NASA and taken October 28, 2010.[Photo/Agencies]

A night time photograph made by an International Space Station Expedition 25 crewmember shows a view of the northern Gulf coast in this image provided by NASA and taken October 29, 2010. The lights of Mobile Bay, New Orleans and Houston are visible as well as the Interstate Highway 20 cities of Jackson, Shreveport, Dallas and Fort Worth as the view extends northward (left) to Little Rock and Oklahoma City.[Photo/Agencies]

A night time photograph made by an International Space Station Expedition 25 crewmember shows a view of Sicily and the "boot" of Italy, with the Mediterranean Sea representing most of the visible water in the view, and the Adriatic Sea to the right of center in this image released by NASA and taken October 28, 2010. [Photo/Agencies]

Russian cosmonauts Fyodor Yurchikhin works outside the International Space Station in this view from the helmet camera of fellow spacewalker Oleg Skripochka as the pair work to outfit the Russian segment of the orbiting laboratory for future assembly work and to support external experiments November 15, 2010. [Photo/Agencies]