As hundreds of thousands of March For Our Lives protesters gathered on the western edge of New York City’s Central Park Saturday, Paul McCartney was there to honor the murder of his legendary song-writing partner and fellow Beatle, John Lennon. Within eyeshot of the scene of the scenes of his death decades ago and just steps away from the Central Park memorial honoring the iconic singer-songwriter, McCartney wore a shirt with the words “we can end gun violence” written across it. “One of my best friends was killed in gun violence right around here, so it’s important to me,” McCartney told CNN at the march. Nearly four decades ago, Lennon died after Mark David Chapman shot him near the gates of The Dakota, his New York City apartment building.