By MARK LONG
AP Sports Writer
INDIANAPOLIS (AP) — Stefan Wilson is honoring his brother and three friends who died. Jimmie Johnson is remembering a loved one who served in the military. Marco Andretti is commemorating his 250th start. More and more Indy 500 drivers are wearing one-off helmets styled to stand out during “The Greatest Spectacle in Racing.” It’s a growing trend as dozens in the 33-man field are using their protective headgear as high-speed art that’s showing no sign of slowing down.