Numbers: Jul. 23, 2007

FINANCES

$15 trillion

Estimated assets held by Americans 65 and older, the most in history for that age group

30%

Percentage of Americans 65 and older who say they don't have enough money to meet their basic living expenses

WEATHER

116°F

Temperature in Las Vegas on July 5, tying the record set on that date in 1985

30

Number of U.S. states facing a drought as of July 5

AERODYNAMICS

50%

Proportion of the primary structure of Boeing's new Dreamliner aircraft, unveiled on July 9, that is made of carbon fiber and other composites instead of aluminum. The new materials reduce...

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