More details have emerged about an apparent infiltration of Islamic terrorists through US ports during the past two months.Some of the men slipped through secuirty disguised as stevedores, according to Bob Graham Chair of the Senate Select Committee on Intelligence.He said he had seen reports indicating that some extremists might have been wearing safety jackets and protective helmets to give the appearance of dockworkers.U.S. Coast Guard Officials have refused to divulge any information about the reports but Graham stressed: 'The American people have a right to know.'He said 25 extremists 'entered in a foriegn country, hid out in a container...