Eduardo Clark holds American and Cuban flags across the street from the Cuban embassy in Washington, D.C., U.S., on Monday, July 20, 2015. A diplomatic freeze that stretched five decades, outlasting the Cold War and nine U.S. presidencies, formally ends Monday when Cuba and the U.S. reopen embassies. Cuban Foreign Minister Bruno Rodriguez will attend a flag-raising ceremony at the Cuban chancery in Washington before meeting Secretary of State John Kerry, who will travel to Havana at a later date. Photographer: Andrew Harrer/Bloomberg via Getty Images