On Friday afternoon, Austin Stephanos and Perry Cohen bought $110 worth of gas for their 19-foot fishing boat and set off from Jupiter, Fla., in the direction of the Bahamas, in what NBC News reports is the last sighting of the two 14-year-olds. The two boys were reported missing when they failed to return that evening, reports WPBF, and the US Coast Guard says it has since searched nearly 15,000 square nautical miles for the pair. The boys' families don't believe they would have tried to reach the Bahamas; the AP notes that neighbor Joe Namath is offering a $100,000 reward. "The commitment (of the US Coast Guard) has been fantastic," Perry's stepdad tells WPBF. A Coast Guard rep says the boys were ill-equipped to be out overnight, and that the search has shifted north in the belief that their boat is disabled and drifting. (More Florida stories.)