On Dec. 8, 1980, Mark David Chapman clutched a .38 Special revolver loaded with hollow-point rounds, took aim and fired four bullets into the back of John Lennon outside his Manhattan apartment.
On Saturday, fellow Beatle Paul McCartney, wearing a shirt with "We can end gun violence" emblazoned on the front, was on hand for the March for Our Lives rally in New York, joining thousands of marchers calling for stricter federal gun laws in the wake of the Parkland, Fla., shooting on Feb. 14.
"One of my best friends was killed in gun violence right around here," McCartney told CNN, "so it's important to me." He was referring to Lennon, his former band mate in arguably the biggest music group ever, who was killed more than 30 years ago.
More than 800 events were scheduled to take place around the world Saturday, according to March for Our Lives organizers, including the anchor event in Washington.