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The Deepwater Horizon oil rig in the Gulf of Mexico explodes, spilling millions of gallons of oil into the sea. The spill becomes the worst oil spill in American history.
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In the 2010 midterm elections, the Republicans retake the House of Representatives as the Democrats lose 63 seats.
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Same-sex marriage is legalized in all 50 US states.
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Donald Trump becomes the 45th President, Mike Pence becomes Vice President. Trump is the first person without prior military or government service to hold the office.