The 1960s — that extraordinary decade — is celebrating its 50th birthday one year at a time. Happy birthday, 1965! How, though, do you commemorate the Vietnam War, the era’s signature catastrophe? After all, our government prosecuted its brutal and indiscriminate war under false pretexts, long after most citizens objected, and failed to achieve any of its stated objectives. More than 58,000 Americans were killed along with more than four million Vietnamese, Laotians, and Cambodians.