Two members of the FBI's ultra-elite Hostage Rescue Team were killed Friday during a training accident involving a helicopter off the coast of Virginia Beach. A spokeswoman for the FBI's Norfolk office, Vanessa Torres, confirmed Sunday the accident occurred Friday afternoon off the Virginia Beach coast, but did not provide additional details. The FBI said in a statement that the two men killed were Special Agent Christopher Lorek, 41, and Special Agent Stephen Shaw, 40. "We mourn the loss of two brave and courageous men," FBI Director Robert S. Mueller said. "Like all who serve on the Hostage…