Image We spotted a bomb-sniffing dog roaming the infield before track walk this morning. Credit GuyB Related: Supercross Supercross 2016 Vital MX Pit Bits Detroit Use keyboard arrow keys to browse the gallery. Swipe to browse the gallery. Prev Next 3 of 41Autoplay Autoplay SlowMedFast Share to Facebook Facebook Facebook Share to Twitter Twitter Twitter GuyB 3/19/2016 2:51pm Share to Facebook Facebook Facebook Share to Twitter Twitter Twitter