61.   Warm and humid weather will dominate much of the East on Sunday as high pressure along the New England coast circulates tropical air up the Atlantic Seaboard.

62.   Wednesday night, the front separating Arctic air and tropical air will shift to the central Appalachians.

63.   With their rotors pounding the hot tropical air, the three Vietnam-era helicopters lift off.

64.   Inside, the factory appeared clean and well-maintained, but the sweltering tropical air was thick with the powerful fumes of glue.

65.   Its cars have since rusted where they were left in the tropical air.