The Coast Guard is asking for assistance from the public in the search for a kayaker who went missing on Lake Champlain, Vt., Saturday. Sean Hawley, a 25-year-old, 180 pound, 6-foot-2-inches man was last seen at 11 p.m. Saturday paddling a black, inflatable kayak in the direction of Plattsburg, N.Y., near Colchester Point, Vt. His kayak was found today but the kayaker is still missing.