With one swift slash from a samurai sword, John Pontolillo made a convincing case for ... private ownership of handguns? Oh, you betcha. Pontolillo is an undergraduate at Johns Hopkins University. Before Sept. 15, that's all he was... But nine days ago, Pontolillo went from being a simple college guy to being in the center of the maelstrom that developed after he slashed a burglar in the backyard of a house he shared with fellow JHU students. Pontolillo used a samurai sword to defend himself after the burglar lunged at him. With one swish he nearly severed the burglar's left...