Number of people per car sold in US 1971-2011

Tax Rates in the US Over the Past Century

Defense Spending compared to the Federal Budget

Defense Spending in the US over the past 70 years

U.S CPI Inflation Index

Eric Hilaire

Photographer Peter Caton talks about his visit to the Cerrado – the world's largest savannah. It contains 5% of the world's biodiversity, but is being destroyed at an incredible rate to make way for monocultures that may have devastating long-term effects.

Azad Essa

Millions of people in up to five West African countries will face a food crisis in early 2012 if early warning systems are ignored, the United Nations and aid officials say.

CORNELIA DEAN

U.S. sets record with a dozen billion-dollar weather disasters in one year

Home prices in the last decade

Rising deficits and the US debt limit