They ready their planes and arrive over their targets like clock work , shooting down some German Luftwaffe planes in the process .
However , they are soon called for a debriefing about their next mission , a strike deep into Germany 's industrial region , the Ruhr .
They ready their planes and arrive over their targets like clock work , shooting down some Germany Luftwaffe planes in the process .
However , they are soon called for a debriefing about their next mission , a strike deep into Germany 's industrial region , the Ruhr .