NEW ORLEANS, LA - JULY 02: Oprah Winfrey speaks onstage during the 2016 ESSENCE Festival presented By Coca-Cola at Ernest N. Morial Convention Center on July 2, 2016 in New Orleans, Louisiana.
WASHINGTON, DC - MARCH 25: President Obama signed a series of bills designating five new National Monuments.
NEW YORK, NY - APRIL 19: Actress/comedian Tina Fey attends the Tribeca Talks Storytellers:Tina Fey With Damian Holbrook at the 2016 Tribeca Film Festival at John Zuccotti Theater at BMCC Tribeca Performing Arts Center on April 19, 2016 in NYC.
Microsoft co-founder and philanthropist Bill Gates speaks on financial development during the annual International Monetary Fund, World Bank Spring Meetings on April 17, 2016 in Washington, DC. / AFP / Mandel Ngan
German-born Swiss-US physicist Albert Einstein, author of the theory of relativity, declares his opposition to the "H" bomb and to the arms race between the USA and the USSR in a conference 14 February 1950 in Princeton.
SIMI VALLEY, UNITED STATES: (FILES) This file picture taken 04 November 1991 in Simi Valley, California, shows US President Ronald Reagan giving a speech at the dedication of the library bearing his name. (J. DAVID AKE/AFP/Getty Images)
ALBERT, FRANCE JUNE 30: Prince William, Duke of Cambridge speaks at the Somme Centenary commemorations at the Thiepval Memorial on June 30, 2016 in Albert, France. (Photo by Steve Parsons - Pool/Getty Images)
SUN VALLEY, ID - JULY 6: Mark Zuckerberg, chief executive officer and co-founder of Facebook Inc., attends the annual Allen & Company Sun Valley Conference, July 6, 2016 in Sun Valley, Idaho.
TOPSHOT - Lady Gaga performs the American National Anthem prior to the start of Super Bowl 50 between the Carolina Panthers and the Denver Broncos at Levi's Stadium in Santa Clara, California, February 7, 2016. / AFP / TIMOTHY A. CLARY
EAST RUTHERFORD, NJ - AUGUST 07: Paul McCartney performs in concert at MetLife Stadium on August 7, 2016 in East Rutherford, New Jersey. (Photo by Mike Coppola/Getty Images)