On Sept. 3, 2013, persons still unknown placed an improvised explosive device inside the Prayer Chapel in downtown Coos Bay. The event triggered the South Coast's largest law enforcement presence in recent memory, involving local, state and federal authotities. The following is a collection of the efforts of reporter Thomas Moriarty and photographer Alysha Beck documenting the initial fire reported in the afternoon, the arrival of state and federal law enforcement that evening and the next day's investigation.