Siegfried Line; Nazi soldiers on hill look at Rhine River; Nazi troops into bunker; view through pillbox window over machine gun; exterior pillbox; Nazis in open trench; blockhouse of concrete; on wall RHEINWACHT; view of Nazi through gun barrel; Nazis place loudspeakers; view of fortifications; Nazi officers tour forts; officer uses range finder; officers exit pillbox door;US bombers in air; Siegfried Line bombed; anti-tank obstacles in snow; US tank passes through; US troops march through; ruins -- Gen. Simpson,Gen. Montgomery, Winston Churchill inspect (REPEAT); tank traps; sign THIS WAS THE SIEGFRIED LINE;