Transgender people were no longer allowed to use public toilets after Obama's rule was rebuked by Donald Trump.
Obama surprised Biden with the Presidential Medal of Freedom during a White House ceremony.
President Barack Obama announced his Clean Power Plan to take action on climate change.
US President Barack Obama met with the Dalai Lama amid warnings from China.
Former President Barack Obama gave his nominee acceptance speech.
President Barack Obama officially declared his support of same-sex marriage.
The FBI's most wanted man, Osama bin Laden, was killed by the US Navy Seals and CIA operatives in Abbottabad, Pakistan.
The 'Don't Ask Don't Tell' policy was repealed.
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.
Barack Obama became the first African American to win a United States Presidential Election.
