Marvel’s “Captain America: The Winter Soldier” premiered in Los Angeles.
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The US army enlisted its first female colonel, Julia Flikke.
Itza, the last Mayan kingdom, was conquered by Spanish forces.
Sixteen primary school children and one teacher were killed in a mass shooting in Dunblane, Scotland.
Bill Gates left the Microsoft board after founding the company four decades prior.
Luciano Pavarotti's final opera took place at New York Metropolitan Opera.
