In a long-anticipated moment, President Barack Obama and Cuban President Raul Castro shook hands warmly and smiled for the cameras as they greeted each other at the Revolutionary Palace.
It was the leaders' first meeting since Obama arrived in Cuba on Sunday and a milestone in the new era of closer relations between the two countries.
Obama and Castro exchanged words briefly, although their remarks were not picked up by the television cameras nearby.
The men then watched a display of Cuban troops. Secretary of State John Kerry, National Security Advisor Susan Rice and several other U.S. officials looked on.
Obama and Castro have met before. They first shook hands in 2013 in South Africa at the Nelson Mandela's funeral.