The Coast Guard suspended its search for three crewmen who were missing after two towing boats collided at mile marker 123 in the Mississippi River near Luling, Louisiana. The collision occurred about 5:30 on Sunday morning. The Coast Guard says the towing vessel Cooperative Spirit was going upriver when it entered a barge fleeting area and hit some barges before colliding with the towing vessel RC Creppel. Four crew from the RC Creppel were thrown into the water. The boat sank in the river. A good Samaritan boat recovered one of the crew. The Coast Guard sent three search-and-rescue boats…