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This week marked a new step in Michelle Obama's evolution as first lady. In her hometown of Chicago, she delivered one of the most emotional speeches of her career. Obama almost never ventures into the top political controversy of the day, but her role may be changing.

U.S. Team Pursuit speed skaters will top speeds of 30 mph by pushing themselves around the track mere inches from each other.

The candidates clashed over war, gender and health care with less than three weeks to go before the first votes in the Democratic presidential nominating fight.

B. Todd Jones, the top federal prosecutor in Minnesota, has been tapped as acting director of the agency, which is under pressure from Congress after a botched gun-trafficking operation known as "Fast and Furious." A colleague says of Jones, "When the going gets tough, he can be one of the toughest guys in the room."

Maj. Gen. Ivan Popov said Russia's military leadership was angered by his frank talk about challenges faced by his forces, particularly the shortage of equipment that resulted in Russian casualties.

In a flurry of picks on Friday evening, Trump named three choices for top health jobs. Together they would help the incoming president shift the priorities of agencies that are key to public health.

Killer whales off Mexico have developed coordinated hunting skills to take down whale sharks, adding to their reputation as the ocean's top predator.

The watchdog group American Oversight had asked a federal judge to order top national security officials to preserve any messages they may have sent on the private messaging app Signal.

Three top security chiefs were killed in Iran, including the military's chief of staff. Also hit was Iran's main nuclear enrichment facility. What do Israel's strikes on Iran mean for the stability of the region?

A possible deal is brewing between the White House and the GOP House leadership, but it's unclear if Congressional Democrats will go along with it. To find out, Robert Siegel talks to Maryland Rep. Chris Van Hollen, the top Democrat on the House Budget Committee, to hear how the proposal to extend the debt ceiling deadline into late November is being received by his fellow party members.