moment that played out in panama city, panama. a brief but symbolic handshake between the presidents of the united states and cuba. both leaders are expected to have a longer meeting later today. the two presidents greeted each other at the opening dinner at the summit of americas in panama city, panama. this was their first face-to-face meeting since agreeing to renewed diplomatic relations after more than 50 years. this is also the first thyme cuba has been not -- time cuba has been invited to attend. shasta darlington with more from panama. >> reporter: the moment we've all been waiting for -- the handshake between u.s. president of the united states and cuban leader raul castro. there pictures popping up across social media, and there's also a video that's been posted on line that shows raul castro leaning in, saying "how are you" in english. the two shake hands, flashes go off. a historic moment and symbol of that thaw that we've been talking about. the two countries that have