Greek authorities have been met with mostly closed lips as people on the Canadian vessel Tahrir, intercepted during its journey to Gaza, have refused to reveal who the captain is. Everyone aboard has agreed not to produce more than names, citizenships and addresses during an investigation to reveal who was in control of the vessel when it departed Monday without authorization. Two Canadians who used kayaks to block a boat that later impounded the Tahrir have already been charged with obstructing a coast guard vehicle, and remained in custody on Tuesday. Twenty-two of the boat’s 38 delegates are from Canada, in addition to nine journalists from six countries who have also faced questioning from Greek officials. The Tahrir was supposed to be part of a flotilla headed for Gaza, though there has been little success in launching any of the vessels.