INDIAN RIVER COUNTY — An unknown object seen falling from the sky and hitting the Atlantic Ocean prompted a multi-agency search off the coast of Treasure Shores Beach Park on Thursday. The agencies used aircrafts – including the C-130 “Hercules” – and boats to scan 40 square miles of the water for any sign of debris from the object. “Patrick Space Force Base confirmed it was not conducting military training exercises at the time, but noted milit…