President Barack Obama announced his Clean Power Plan to take action on climate change.
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Obama surprised Biden with the Presidential Medal of Freedom during a White House ceremony.
The FBI's most wanted man, Osama bin Laden, was killed by the US Navy Seals and CIA operatives in Abbottabad, Pakistan.
Barack Obama became the first African American to win a United States Presidential Election.
US President Barack Obama received a vaccine jab against the swine flu.
The USA's first African-American President, Barack Obama, conducted his first address.
