Divers from the FBI continue are investigating multiple underwater targets in the Potomac River that could be additional aircraft debris from the collision between a Mitsubishi Heavy Industries (MHI) RJ Aviation (Bombardier) CRJ700 and a Sikorsky UH-60 Black Hawk helicopter.The PSA Airlines Bombardier CRJ700 airplane operated as American Airlines Flight 5342 from Wichita, Kansas, to Reagan Washington National Airport and the US Army helicopter collided at 8:47 p.m. ET on January 29…