None of the 67 passengers and crew are believed to have survived
The main concept of the provided text is the connection between the DC plane crash and a military "doomsday" training exercise.
The Black Hawk helicopter involved in the crash was executing a route part of a plan to evacuate government officials in a national emergency. This detail adds context to the tragic event, highlighting the potential severity of the situation the helicopter was participating in.
Furthermore, the ongoing investigation involving the recovery of "black boxes" from both the helicopter and the American Airlines jet emphasizes the ongoing effort to understand the contributing factors to the collision.
The main concept of the provided text is the connection between the DC plane crash and a military "doomsday" training exercise. The Black Hawk helicopter involved in the crash was executing a route part of a plan to evacuate government officials in a national emergency. This detail adds context to the tragic event, highlighting the potential severity of the situation the helicopter was participating in. Furthermore, the ongoing investigation involving the recovery of "black boxes" from both the helicopter and the American Airlines jet emphasizes the ongoing effort to understand the contributing factors to the collision.
