They protected the Bombers by escorting them and protecting them against enemy fighters. Hope this helped :)
Built (1811–37) from Cumberland<span>, </span>Md.<span> (western terminus of a state road from </span>Baltimore<span> and of the Chesapeake and </span>Ohio<span> Canal), to </span>Vandalia<span>, Ill., it forms part of the present </span>U.S. Route 40<span>.</span>
<span>eliminated in the north. That's the right answer. </span>
