51.   But the enhanced system not only knows where the mountains are but also knows the location of the airports.

52.   Contrary to what one might expect, fall arrives first at the southern end of the parkway, because the mountains there are higher and the temperatures lower.

53.   Fifty years later, the mountain is still on the cutting edge.

54.   For decades, the mountain has been little more than a backdrop for vacation photographs.

55.   For starters, I have no meadow, and the nearest mountains are a state away.

56.   For Polly, there were mountains of teddy bears in a parking lot in Petaluma, Calif.

57.   For the Navajo, the mountains are one of four borders to their universe.

58.   For the Navaho, the mountains are one of four borders to their universe.

59.   From casual packed-trail riding to cross-country rambles to professional-level slalom and downhill races, mountain biking is as ubiquitous these days as hiking.

60.   He said the mountain was part of a centuries-long turquoise trade that stretched from the Four Corners area to Central America.