york city hospital tonight. a government source in washington says he is suffering from cancer and blocked bile duct. >> the shah was admitted that he not engage in political activity while here. the present iranian government was assured of that. meanwhile, tighter security measures put into effect at the u.s. embassy in iran. >> carter agreed to allow the shah to come to the united states for medical treatment. an at that point it was the match that lit this conflagration. >> the american embassy in tehran is in the hand of moslem students tonight. spurred on by anti-american speech by ayatollah khomeini, they stormed the embassy, overpowered them and took dozens of american hostages. >> the iranians burned the united states flag and denounced the u.s. government saying they