President Barack Obama announced his Clean Power Plan to take action on climate change.
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The FBI's most wanted man, Osama bin Laden, was killed by the US Navy Seals and CIA operatives in Abbottabad, Pakistan.
The USA's first African-American President, Barack Obama, conducted his first address.
Transgender people were no longer allowed to use public toilets after Obama's rule was rebuked by Donald Trump.
US President Barack Obama received a vaccine jab against the swine flu.
Barack Obama became the first African American to win a United States Presidential Election.
