Although huge in scope and impact, the 9/11 attacks were not the first threat by foreign terrorists on American soil. During World War II, eight Germans landed on our shores in 1942 bent on sabotage. Caught before they could carry out their missions, under FDR's presidential proclamation they were hauled before a secret military tribunal and found guilty. Meeting in an emergency session, the Supreme Court upheld the tribunal's authority. Justice was swift: six of the men were put to death--a sentence much more harsh than would have been allowed in a civil trial.

Louis Fisher chronicles...