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Texas Gov. Rick Perry's struggling campaign turns to tried-and-true Republican operatives to shore up its efforts as weeks tick down to primary season. One is a veteran of disaster management.

From Talk of the Nation: Opinions vary widely among a diverse group of experts about the wisdom of a U.S. withdrawal by year's end.

Google is teaming up with a Brazilian environmental group to offer a 3-D, on-the-ground view of one of the planet's most remote areas: the hamlet of Tumbira in the center of the Brazilian Amazon. The goal is to show how people in the Amazon live and their efforts to protect the forest.

Occupy Oakland activists are promising to reconvene later today.

Some 73 million sharks are killed each year for their fins. Despite increased public awareness, large-scale operations are still open for business in many countries, new images show.

Its central feature, the GOP presidential candidate says, is a 20 percent flat tax on income. Also today, the Texas governor said it's "fun to poke" at President Obama over the so-called birther issue.

Nearly 700 Native American children in South Dakota are being removed from their homes every year, sometimes in questionable circumstances.

Experts voted to recommend to the Centers for Disease Control and Prevention that all 11- and 12-year-old boys be vaccinated with Gardasil, Merck's vaccine against human papillomavirus. Vaccinations could start as early as age 9.

Experts caution that gains may be short-lived, especially once mortgage rates normalize.