The Grand Canyon becomes a national park, Michael Jackson's "Thriller" album hits No. 1, a truck bomb explodes under the World Trade Center, and teenager Trayvon Martin is shot and killed, all on this day.
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Sun Records
1932: Country music singer-songwriter Johnny Cash, whose best-known songs included "I Walk the Line," "Folsom Prison Blues," "Ring of Fire," "Jackson," "Get Rhythm" and "Man in Black," is born in Kingsland, Ark.