WASHINGTON, DC January 13: The Capitol’s dome is lit up on a foggy morning as the rehearsal for the Inauguration of President Obama gets underway. According to the Architect of the Capitol the cast iron Dome, weighing in at 8,909,200 pounds, was designed by Thomas U. Walter and constructed from 1855-1866 on January 13, 2013 in Washington, DC (Photo by Jonathan Newton / The Washington Post)