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Millions of acres of forest in the Southwest are overgrown — and ripe to ignite as climate change intensifies drought and heat. Selective thinning and other efforts aim to reduce the risk of catastrophic fires, but those efforts may not be enough to overcome ever-bigger, ever-hotter fires.

Researchers have found an association between sleep problems among older adults and dementia later in life. If diagnosed early, treatments like controlling stimuli before bed can help and possibly reduce the risk of cognitive decline.

Republicans have decided to delay the official start of their presidential nominating convention until Tuesday. Tropical Storm Isaac is causing weather-related issues around Tampa, Florida. As the convention is about to begin, polls show GOP presidential candidate Mitt Romney is tied with President Obama.

In the lakeside city of Oshkosh, a group of union workers say they're tired but ready to keep fighting. They've been through months of bitter battles over state employees' collective-bargaining rights — including a failed attempt to recall Gov. Scott Walker.

Here's a look at the government health care programs for the elderly and the poor, how President Obama's new national health care law affects them, and how Mitt Romney and Paul Ryan want to change things.

On the campaign trail in Pittsburgh this morning, NPR's Ari Shapiro stopped into the hotel gym for an early morning workout. The other person working out in the tiny fitness center had two things of note: an iPad app for the intense P90X exercise routine, and a Secret Service escort.

U.S. Senate candidate Todd Akin apologized for his remarks about rape and pregnancy, but calls have intensified for him to withdraw. Plus, a new e-book claims the Obama campaign is in a constant state of conflict. Guest host Viviana Hurtado speaks with Janice Crouse of Concerned Women for America and Joy-Ann Reid of TheGrio.com.

Jessica King's political views are rooted in her firsthand experience with social services, having grown up as a ward of the state. She was swept into office during the wave of special recall votes in Wisconsin, and says her constituents are fed up with obstructionism in Washington.

Among the hundreds of buildings that crumbled in Haiti's 2010 earthquake was the National Palace. The Haitian government announced Tuesday that demolition of the National Palace will begin soon. A non-profit aid group founded by actor Sean Penn will pay the bill, though it's not clear what will replace the palace.

President Obama has been campaigning among college students. In Nevada and Ohio Tuesday, he told them his policies are better than his opponents for keeping higher education affordable.