The BTIG Commissions's Charity Day is a star-studded event in which all-star athletes, top-recording artists, celebrities from film and television and cultural icons join BTIG in an effort to raise funds for a variety of charities worldwide.
Jeremy Renner and Robert Downey, Jr. ring the Opening Bell with Marvel Entertainment Executives at the New York Stock Exchange in Celebration Of 'Marvel's Avengers: Age Of Ultron' at the NYSE on Wall Street in New York City on April 27, 2015.
Actress Angelina Jolie speaks during a Security Council meeting about the current refugee crisis in Syria at United Nations headquarters in New York City on April 24, 2015.
Jolie has been a UNHCR Goodwill Ambassador since 2001.
President Barack Obama honors the Ohio State Buckeyes, the 2015 College Football Playoff National Championshions, during a ceremony in the East Room at the White House in Washington, D.C. on April 20, 2015.
U.S. President Barack Obama greets veterans during the Wounded Warrior Project's Soldier Ride race around the South Lawn driveway at the White House to celebrate the eighth annual Soldier Ride on April 16, 2015 in Washington, DC.
The Wounded Warrior Project offers programs and services for for U.S. military veterans wounded in conflicts that have occurred after the September 11 attacks.
Every third Thursday in April people across America share high fives with strangers to commemorate National High Five Day. The festivity began in 2002 and looks to raise funds and awareness for important causes. This year, NH5D is benefiting Action for Healthy Kids, an organization that promotes healthy habits and academic success for children.
Here's a photo collection honoring National High Five Day.
Photos from the exhibit "Silent Witnesses: Artifacts of the Lincoln Assassination" at the Ford's Center for Education and Leadership in Washington DC, April 13, 2015. April 15, 2015 will mark 150 years since the fatal shooting of President Lincoln at the Ford's Theatre in Washington DC.
United Press International is a leading provider of news, photos and information to millions of readers around the globe via UPI.com and its licensing services.
With a history of reliable reporting dating back to 1907, today's UPI is a credible source for the most important stories of the day, continually updated - a one-stop site for U.S. and world news, as well as entertainment, trends, science, health and stunning photography. UPI also provides insightful reports on key topics of geopolitical importance, including energy and security.
A Spanish version of the site reaches millions of readers in Latin America and beyond.
UPI was founded in 1907 by E.W. Scripps as the United Press (UP). It became known as UPI after a merger with the International News Service in 1958, which was founded in 1909 by William Randolph Hearst. Today, UPI is owned by News World Communications.
It is based in Washington, D.C., and Boca Raton, Fla.