Unlike the spectacle that greeted the world at the Beijing 2008 Games, venues in Britain are a compromise between grandiose and functional.
Olympic Stadium in London's Olympic Park is the centerpiece of the Games, hosting the opening and closing ceremonies as well as sporting events. Its above-ground form means the structure can adapt from 25,000 seats to 80,000.AFP/Getty Images
President Trump and first lady Melania Trump lit the National Christmas Tree for the first time. The program was hosted by television personality Kathie Lee Gifford and actor Dean Cain and featured performances by the Beach Boys, Jack Wagner, Wynonna Judd, Craig Campbell and others.