132 years ago today, on March 13, 1881, Tsar Alexander II was killed by an assassin's bomb in St. Petersburg. The 62-year-old tsar alighted unhurt from his bulletproof carriage after a revolutionary with the People's Will group threw a bomb, killing one Cossack guard and injuring several people. But then another revolutionary threw a second bomb. The tsar known for freeing the serfs died shortly afterward at the Winter Palace.