When the Marines of "America's Battalion" first arrived in Afghanistan, they were eager to get into the fight against the Taliban. Now, as they wrap up their seven-month deployment — and after the loss of a dozen comrades — they see warfare in a different light.

As it gets more difficult to see a primary care doctor, walk-in medical centers are picking up the slack. And if Congress succeeds in passing a nationwide health insurance mandate, the urgent care industry expects even more growth.

Based on studies, two panels of medical experts this week recommended fewer screening tests for breast and cervical cancer. But people don't always want to do what the data say to do.

Senate Democrats hoped to have enough votes this week to pass a health care bill, Obama Cabinet officials faced hostile lawmakers on Capitol Hill and former Alaska Gov. Sarah Palin's much-awaited book hit bookstores. Political analysts E.J. Dionne, of The Washington Post, and David Brooks, of The New York Times, offer their insight.

Two Asian carp species that could devastate the Great Lakes ecosystem may be a few miles from Lake Michigan. To halt their migration, the U.S. Army Corps of Engineers built an underwater electric fence on a canal 20 miles south of the lake. But tests conducted by David Lodge at Notre Dame indicate that they have gotten close to the lake despite the barrier.