French President Emmanuel Macron (left) shakes hands with President Trump, next to first lady Melania Trump, during the annual Bastille Day military parade in Paris on July 14, 2017. Trump is hosting Macron in Washington this week for the first official state visit of his presidency. Christophe Archambault/AFP/Getty Images hide caption
President Trump raises his fist as he leaves after speaking at a rally in Kentucky in March. John Minchillo/AP hide caption
A Wizard of Oz mural honors Grand Rapids, Minn.-native Judy Garland. Don Gonyea/NPR hide caption
Donald Trump, the front-runner for the Republican presidential nomination, gave an outline of his worldview and foreign policy goals in an address in Washington Wednesday. Evan Vucci/AP hide caption
In 2014 photo, demonstrators chant pro-ISIS slogans in front of the provincial government headquarters in Mosul, Iraq. AP hide caption
An engraving of the assassination of President Abraham Lincoln at Ford's Theatre in Washington on April 14, 1865. Lincoln died the next day. De Agostini Picture Library/De Agostini/Getty Images hide caption
President Obama about to walk out into the Rose Garden at the White House to announce the framework of a nuclear deal with Iran. Nicholas Kamm/AFP/Getty Images hide caption
President Obama with Israeli Prime Minister Benjamin Netanyahu at the White House in 2013. The two have never had a warm and fuzzy relationship. Charles Dharapak/AP hide caption
Josef Joffe, author of The Myth of America's Decline, says the U.S. remains a world leader in education, economic performance and innovation. Samuel LaHoz/Intelligence Squared U.S. hide caption
President Barack Obama gestures during a joint news conference with German Chancellor Angela Merkel in the East Room of the White House. Evan Vucci/AP hide caption