The 1930s-era red buses that ply the roads of Glacier National Park in Montana were possibly its most "endangered species." The 33 White Motor Company Model 706 buses make one of the oldest fleets anywhere in the world still in continuous service. But their future has not always been guaranteed. Repeatedly over the decades the red buses have been in danger of being pulled off the road. In delving into their history, author and historian Ray Djuff offers insight into their origin, operation and how the red buses were resurrected when faced with the threat of being tossed into the dustbin of history.