A US warplane damaged an Iranian oil tanker’s rudder after it tried to break a US blockade of Iranian ports. WASHINGTON: A US Navy warplane fired on and disabled the rudder of an oil tanker that tried to break Washington's blockade of Iranian ports, the US military said on Wednesday (May 6). It is the second time the US military has fired on a ship it said was attempting to violate the blockade, which has been in place since Apr 13. US forces warned the Iranian-flagged M/T Hasna, which was