CNN Anderson Cooper 360 December 18, 2014 04:05:00
They started 18 months ago. june of last year. senior officials say most discussions took place in canada led by national security adviser, deputy national security adviser. ben rhoads. the wheels were in motion, when the president and raul castro shook hand at nelson mandela's memorial. i was there in south africa. but all along. one key sticking point. you mention remained. alan gross. pope francis stepped in. sent letters to president obama and raul castro, urging beth to resolve gross' status. and push talks forward. the vatican welcomed officials to rome last october. all happening with n...