**FILE** FBI agents and New York state police guard the reconstruction of TWA Flight 800 in Calverton, N.Y., on Nov. 19, 1997. Flight 800 exploded and crashed July 17, 1996, while flying from New York to Paris, killing all 230 people aboard. An FBI investigation has concluded that there is no evidence that the crash was the result of a criminal act. (Associated Press)
Members of the Joint Federal Haz-Mat Team, FBI and local law enforcement gather in front of the Osmun Apartments in Spokane, Wash., to execute a search warrant in connection with ricin-laced letters intercepted at a post office in the city's downtown earlier in the week. (AP Photo/The Spokesman-Review, Colin Mulvany)
** FILE ** On Tuesday, May 7, 2013, members of an FBI evidence response team carry out the front screen door from a house in Cleveland where three women were held against their will for a decade. (AP Photo/Tony Dejak)