One Westchester County mother took a stand against gun violence.

Donna Nolan marched across the Brooklyn Bridge along with a crowd for the 4th annual Moms Demand Action for Gun Sense in America.

Her son Michael was killed in a drive-by shooting in Yonkers last year.

Nolan was joined by many others at the march, including actress Julianne Moore and the mother of Alison Parker, the television reporter shot to death during a live broadcast in Virginia last summer.