Thousands of gallons of oil gushed from a broken freighter and fouled Unalaska Island beaches Thursday as hope dwindled for six of its crew who were lost the night before in the crash of a Coast Guard rescue helicopter. Daylight brought calmer seas to the rugged, rocky west shore of Unalaska, but revealed an ugly sight: A thick sheen of oil spreading hundreds of yards from the two halves of the vessel in all directions. Responders flying over the scene Thursday saw what they thought looked like two dead cormorants. Rear Adm. Jim Olson, the Coast Guard commander in Alaska,...