21.   The Santa Anas are the result of a high-pressure system squeezing hot desert air into Los Angeles, Seto said.

22.   The sixth-seeded Rusedski said the desert air might also increase his chances of breaking his serving record again.

23.   Their detection equipment measured the desert air continuously for any trace of chemical agents.

24.   They are made of mud brick, many with domes, decorated with primitive frescoes in bright colors, depicting biblical scenes, well-preserved by the dry desert air.

25.   This time, the migrants and their teen-age guide sprinted past a line of buildings and disappeared into the cool desert air.

26.   Walking is a good option for the healthy, but be advised that distances are not what they seem in the dry desert air.

27.   Where else would you find opera patrons wrapped in blankets to ward off the cold desert air, or bundled in parkas, or wearing baseball caps?

28.   Without the insulating layer, heat from desert air flows to the skin, making the wind seem like a blowtorch rather than a refreshing, cooling breeze.

29.   You board inside the casino complex and ride out into the open desert air.

30.   Pairs of small vacuums will suck out the moist air and pump in dry desert air.