The internment of the Japanese-Americans was an unfortunate example of bigotry, and Japanese-Americans rose above such bigotry to serve the U.S. with distinction. The book Yankee Samurai details the heroic service of Japanese-Americans in the Pacific theater, serving largely as translators. The book has a harrowing account of a young GI being lowered naked into an Okinawan cave to convince the people inside to surrender. Sadlynaught commenter pedestrian (in an epic, epic thread) suggested that Ito Hideaki play said GI).
Of course, parallels can be drawn to the conflict in which the U.S. is currently embroiled, to the extent that right wing pundits (notably the odious Michelle Malkin nee Manananggal (heh, Wak Wak)) defended internment, making a case for similar treatment of Muslim Americans. The "sneak attack" aspects of both Pearl Harbor and 9/11 were remarked upon, and the unfortunate characterization of American citizens and resident aliens as a "Fifth Column" soon followed.
Yeah, remember Pearl Harbor, but learn from it. The people of Japan are now steadfast allies of the people of the United States. This is mostly due to the fact that our occupation of Japan post World War 2 was relatively restrained, and efforts were made to rebuild the Japanese economy (I imagine this was largely as a bulwark against Soviet expansion in the Pacific Rim). Yeah, soft power works. Unfortunately, we have recently tended to treat our allies worse than we used to treat our enemies.
To get your minds of Malkin and wingnuts, here's FDR's famous "Pearl Harbor" speech: