Cuba put seven political opponents and their families on a plane to Spain on Tuesday as part of an accord to release 52 jailed dissidents, the biggest gesture of its kind in a decade. In parallel to the release however, Cuba's revolutionary leader Fidel Castro made a rare television appearance in which he warned of an "imminent" US-Israeli attack on Iran and accused the United States over the sinking of a South Korean navy ship which has been blamed on Stalinist North Korea.Duration: 02:12