Andy and Barbara Parker, of Collinsville, Va. mourn the loss of their daughter, Alison Parker, a journalist for WDBJ, Friday, Aug. 28, 2015 in Roanoke, Va. Reporter Alison Parker and cameraman Adam Ward were killed by a former colleague during a live broadcast Wednesday, while on assignment in Moneta, Va. (Stephanie Klein-Davis/The Roanoke Times via AP) LOCAL TELEVISION OUT; SALEM TIMES REGISTER OUT; FINCASTLE HERALD OUT;  CHRISTIANBURG NEWS MESSENGER OUT; RADFORD NEWS JOURNAL OUT; ROANOKE STAR SENTINEL OUT; MANDATORY CREDIT MBI

Alison Parker’s father to join gun violence survivors, state leaders in in D.C.

This Thursday, Andy Parker will make his first visit to Washington, D.C. since his daughter, WDBJ7 reporter Alison Parker, was killed on liv…