ABC News’ Martha Raddatz reports on the two-year anniversary of the Abbey Gate bombing on “This Week.” SUBSCRIBE to ABC News: bit.ly/2vZb6yP WATCH MORE on abcnews.go.com THIS WEEK: abcnews.go.com/ThisWeek LIKE ABC News on FACEBOOK: facebook.com/abcnews FOLLOW ABC News on TWITTER: twitter.com/abc #ABCNews #ThisWeek #goldstar #afghanistan #abbeygate