April 21 (UPI) -- Iran on Tuesday demanded the United States release the Iranian-flagged container ship the U.S. military seized over the weekend, threatening to use "all its capacities" to defend itself as the cease-fire neared its end. The U.S. military seized Touska on Sunday as it enforced a military blockade of Iranian ports and ships, raising already high tensions during a two-week cease-fire rapidly nearing its end that negotiators from both countries are to use to secure an end to the