tock car races are closely contested, with the winner some- times having a . 1 -second margin of victory. Veteran race observers frequently say that "races are won or lost in the pits," meaning that afast pit stop can provide the margin of victory and a slow stop can lose a race. To be effective and help their driver win, the pit crew must work as a team. National Park Service rangers form rescue teams in the national parks and rehearse rescue situations. Yosemite National Park in California attracts thou- sands of mountain and rock climbers. Unfortu- nately, not all of these climbers are experienced, and many get into dangerous situations. Yosemite averages 125 to 150 rescue missions each year. Rangers with an interest in mountain climbing are drawn to the mountainous parks like Yosemite,
全文预览
