Fidel Castro back on TV after four years off screen

Former Cuban leader Fidel Castro, who has lived in seclusion since falling ill four years ago, has given a TV interview. He spoke slowly, but appeared relaxed. The revolutionary leader discussed Iran's nuclear programme, and tensions with the U.S. and North Korea - though he didn't touch on internal matters. Cuba has just begun releasing 52 political prisoners, jailed in a crackdown on the opposition while Castro was in power.