A woman, left, puts a sign around a tree reading "The empty space, it hurts so much, but Rinke will be always with us in our thoughts", referring to one of three victims, at the site of a shooting incident in a tram in Utrecht, Netherlands, Tuesday, March 19, 2019. A gunman killed three people and wounded others on a tram in the central Dutch city of Utrecht Monday March 18, 2019. (AP Photo/Peter Dejong)