"Let's go! Let's go! Out the door before this thing blows!"
— Echo One-One if the player doesn't immediately jump out of the plane in Mile High Club
Echo One-One is the callsign of a Task Force 141 member who took part in rescuing a hostage in "Mile High Club" alongside One-One Team. He, along with Charlie One-One, Romeo One-One and the player's character managed to fight their way throughout the plane, rescued the hostage and parachute to safety. Before Echo One-One could leave the plane however, a bomb that had been set by the terrorists on the plane exploded, killing Echo One-One and destroying the plane.
Oddly, when One-One team reaches the staircase and moves to the second floor, Echo One-One does not move any farther than the staircase. At this point,the player could shoot and kill One-One. He does not even move when the bomb is set.
Ironically, Echo One-One tells the player to hurry up and leave the plane before the bomb explodes, but he himself fails to leave the plane.