Romulus Vereș (23 January 1929 in Cluj – 13 December 1993 in Ștei) was a notorious serial killer from Romania, known as "The Man with the Hammer".

Samuel Joseph Byck (January 30, 1930 – February 22, 1974) was an American hijacker and attempted assassin. On February 22, 1974, he attempted to hijack a plane flying out of Baltimore/Washington International Airport, intending to crash into the White House in the hopes of killing U.S.