US President Barack Obama met with the Dalai Lama amid warnings from China.
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Obama surprised Biden with the Presidential Medal of Freedom during a White House ceremony.
Transgender people were no longer allowed to use public toilets after Obama's rule was rebuked by Donald Trump.
President Barack Obama announced his Clean Power Plan to take action on climate change.
Barack Obama became the first African American to win a United States Presidential Election.
The 'Don't Ask Don't Tell' policy was repealed.
