A entire national military operation was able to do both why wouldn't a loosely connected group of individuals be able to do the same?
The next time some whackjob runs that propaganda line off at you give them a "Well if you know your history..." line (they love that one) and mention one of the little told stories of WWII.
The Germans dispatched submarines (U-boats) across the Atlantic and they reak havoc along North Carolina's Outer Banks sinking at least 397 merchant ships.
http://www.ww2incolor.com/shop.php?mode=VHS&item=1888285176The United States suffered one of its worst defeats of WWII not in Europe or the Pacific but along the nation's eastern seaboard.
Three hundred ninety-seven ships were sunk or damaged and nearly 5,000 people were killed. The loss of lives, ships and raw resources represents one of the greatest maritime disasters in history.
For six months, sixty-five German U-boats hunted Allied merchant vessels practically unopposed within view of American coastal communities. The greatest concentration of these attacks occurred off North Carolina's Outer Banks. War Zone is a story of infamy, irony and innocence lost.