Greg Zanis, who has made thousands of crosses since 1996 for people killed, has announced that he's is retiring.
Zanis made white crosses for the victims of the 1 October mass shooting that were originally installed at the famous Welcome to Fabulous Las Vegas sign.
PHOTOS: 58 White Crosses Honor Mass Shooting Victims
Zanis says that the breaking point was when a gunman killed 5 people in his Illinois hometown in February.
