the extension of US-China Visas for Short-term Business Travelers, Tourists, and Students up to 10 years
U.S. and Chinese citizens who regularly travel back and forth between the U.S. and China will benefit from the longer validity by not having to apply and pay the application fee every year. Businesses in both countries, including the tourism industry, will benefit from increased travel, investment, and business development opportunities between the two countries. Longer visa validity will allow students and exchange visitors to return to their home countries during school and work holidays more easily. (source:travel.state.gov)
The legalization of same-sex marriage
In the United States, same-sex marriage has been legal in all states, Washington, D.C., as well as all U.S. territories except American Samoa, but not on Indian lands, since June 26, 2015, when the United States Supreme Court ruled in Obergefell v. Hodges that state-level bans on same-sex marriage are unconstitutional. The court ruled that the denial of marriage licenses to same-sex couples and the refusal to recognize those marriages performed in other jurisdictions violates the Due Process and the Equal Protection clauses of the Fourteenth Amendment of the United States Constitution. (source: Wikipedia)
Order to kill Osama bin Laden
On May 2, 2011, Al Qaeda leader Osama bin Laden is killed by U.S. Special Forces during an early morning (approximately mid-afternoon on May 1 in the United States) raid in Abbottabad, Pakistan. http://www.cnn.com/2013/09/09/world/death-of-osama-bin-laden-fast-facts/
"America's global leadership on climate change"
"President Obama believes that no challenge poses a greater threat to our children, our planet, and future generations than climate change — and that no other country on Earth is better equipped to lead the world towards a solution. That’s why under President Obama’s leadership, the United States has done more to combat climate change than ever before, while growing the economy. In fact, since the President took office, carbon emissions have decreased 9 percent, while the U.S. economy grew more than 10 percent." (source:whitehouse.gov)
health insurance coverage
Despite numerous Republican threats and challenges to the Affordable Care Act (ACA), the president's landmark health bill survived 2015. In June, the Supreme Court even upheld a major part of the Obamacare legislation, ruling in a 6-3 decision that the federal government can give out subsidies to its consumers in all states, no matter whether they signed up through the federal or state-based exchange.
"The rate of the uninsured in America dropped below 10 percent for the first time ever," Mr. Obama said in his video. "In all, 17.6 million people and climbing have gained coverage as the Affordable Care Act has taken effect." (source:http://www.cbsnews.com/news/obamas-top-10-accomplishments-according-to-obama/)