$8.184 trillion New federal debt ceiling approved by Congress, equal to about 70% of U.S. annual GDP
3 Number of times Congress has raised the debt limit since 2001--when the budget surplus became a deficit--boosting the U.S. credit line by $2.2 trillion
18 Predicted number of months to reach the new cap
6,500 Speed, in miles per hour, attained by NASA's "scramjet," the first jet aircraft to go Mach 9.6, or 2 miles per second
20 Number of minutes it would take to fly from New York City to Los Angeles at that speed
8.2 million Number of U.S. households with...