This day in history by Halei Lamb | April 28, 2017 4:14 pm Last Updated: April 28, 2017 at 4:16 pm 1788 Maryland became the 7th state in the United States. 1789 Fletcher Christian led the mutiny aboard the British ship Bounty against Captain William Bligh. 1945 Benito Mussolini was executed. 1947 Thor Heyerdahl and five others began their Pacific Ocean crossing on the raft, Kon-Tiki. 1967 Boxing champion Muhammad Ali refused to be inducted into the Army. 1992 The U.S. Dept. of Agriculture unveiled its first “food pyramid.” 2001 Dennis Tito became the first space tourist.