Barack Obama was elected as the 44th President of the United States in the 2008 presidential election.

The Affordable Care Act, also known as Obamacare, was signed into law by President Obama in 2010.

Operation Neptune Spear was the military operation that resulted in the death of Osama bin Laden in 2011.

Sonia Sotomayor was nominated and confirmed as a Supreme Court Justice during President Obama's first term.

PRISM was the controversial law enforcement program that collected phone and internet data without a warrant.

President Obama visited Cuba in 2009, becoming the first sitting U.S. President to do so.

The American Recovery and Reinvestment Act was the economic stimulus package passed by Congress in 2009 in response to the Great Recession.

President Obama defeated Mitt Romney in the 2012 presidential election.

The Don't Ask, Don't Tell Repeal Act was the law that repealed the military's 'Don't Ask, Don't Tell' policy.

Elena Kagan was nominated and confirmed as a Supreme Court Justice during President Obama's second term.

The Joint Comprehensive Plan of Action (JCPOA) was the nuclear agreement reached between Iran and six world powers in 2015.

President Obama visited Vietnam in 2016, becoming the first sitting U.S. President to do so.

The Affordable Care Act was the law that expanded access to healthcare coverage for millions of Americans.

Antonin Scalia retired during President Obama's second term, leading to the nomination of Merrick Garland.