ABC7 WASHINGTON, D.C. — Several days before the first anniversary of the Parkland school shooting, grieving parents and political activists alike joined together to bring their agenda to Capitol Hill. Among those demanding stronger laws to counter gun violence those who have felt its pain first hand. Mark Barden lost his young son Daniel in the Sandy Hook shooting. Now he is fighting for tougher background checks for gun purchases. "There are some instances where somebody can go around that," Barden said. "And purchase a firearm legally without a background check. So we just need to close that loophole." The Feb. 14, 2018 Parkland shooting left 17 students and faculty dead, and 17 others injured. Anti- gun violence advocates believe the time is now for Congress to take action on an array of initiatives. "They are going to get these post cards from constituents," said Erica Ford, anti-gun violence advocate. "We want a gun safety act." ABC7’s Stephen Tschida has more, above.