Nazi German troops began the occupation of Hungary.
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Zack Snyder's 'Batman v Superman: Dawn of Justice' premiered at Mexico City's Auditorio Nacional.
The US state of Nevada legalized gambling after previously banning it in 1909.
Water-bearing minerals were discovered on Mars by NASA's Curiosity Rover.
The first Women's World Championship Ice Hockey Tournament took place in Ottawa, Ontario, Canada.
Wendy's became the world's second best-selling hamburger chain, overtaking Burger King.
