Boxing legend Muhammad Ali passed away this week at age 74. Here's a look back at some moments from his life.
Muhammad Ali onstage during the Michael J. Fox Foundation's 2010 Benefit 'A Funny Thing Happened on the Way to Cure Parkinson's' at The Waldorf-Astoria on November 13, 2010 in New York City.
CINCINNATI, OH - JUNE 20: Former boxing champion Sugar Ray Leonard (L) looks on after presenting the Major League Baseball Beacon Award to former heavyweight boxing champion Muhammad Ali prior to the Gillette Civil Right Game between the Cincinnati Reds and Chicago White Sox at Great American Ball Park on June 20, 2009 in Cincinnati, Ohio.
LAS VEGAS, NV - FEBRUARY 18: (EXCLUSIVE COVERAGE) Boxing legend Muhammad Ali (L) and wife Lonnie Ali appear onstage during the Keep Memory Alive foundation's "Power of Love Gala" celebrating Muhammad Ali's 70th birthday at the MGM Grand Garden Arena February 18, 2012 in Las Vegas, Nevada. The event benefits the Cleveland Clinic Lou Ruvo Center for Brain Health and the Muhammad Ali Center.
NEW YORK - SEPTEMBER 24: Muhammad Ali attends the opening session of the Clinton Global Initiative (CGI) September 24, 2008 in New York City. President Clinton is hosting the fourth annual meeting of the Clinton Global Initiative (CGI), a gathering of politicians celebrities, philanthropists and business leaders grouped together to discuss pressing global issues.
Boxing legend Muhammad Ali, right, visits with young children January 1996 at a hospital in Havana, Cuba. Ali was visiting the island to bring aid to Cuban hospitals.
LOS ANGELES - JULY 13: Boxer and honoree Muhammad Ali arrives at the 20th Annual "Midsummer Night's Magic Awards Dinner" on July 13, 2005 at the Century Plaza Hotel in Los Angeles, California.
1972: MUHAMMAD ALI IN ACTION AGAINST AL ''BLUE'' LEWIS IN DUBLIN, IRELAND.
WASHINGTON - NOVEMBER 09: U.S. President George W. Bush presents former heavy weight boxing champion Muhammad Ali (L) with the Medal of Freedom during a ceremony in the East Room of the White House on November 9, 2005 in Washington, DC. Bush presented 14 Medals of Freedom to recipients including retiring Federal Reserve Chairman Alan Greenspan and Aretha Franklin during the ceremony.
19 Jul 1996: Muhammad Ali holds the torch before lighting the Olympic Flame during the Opening Ceremony of the 1996 Centennial Olympic Games in Atlanta, Georgia.
Heavyweight Boxing champion holds a tennis racket over Tennis player Bjorn Borg July 1979 in USA. Ali is one of the greatest boxers in the history of the sport.
Jack Nicklaus meets Muhammad Ali during the US PGA Championship at Valhalla Golf Club in Lexington, Kentucky, USA.