US President Barack Obama shook hands with his Cuban counterpart, Raul Castro, at the Summit of the Americas in Panama. The gesture has been seen as signaling a historic thaw between the two countries as they seek to reestablish diplomatic relations.
Obama and Castro encountered each other in the midst of other foreign leaders at the summit. Photographs and videos from the event showed the two shaking hands as they greeted one another, as well as nodding as they spoke.
Leaders of the United States and Cuba have rarely spoken over the past 50 or so years because of an American embargo implemented against Havana, which was put in place shortly after Fidel Castro led a socialist revolution in the 1950s. However, last year, the two countries announced that they would look to mend their strained relationship.