Tough questioning from conservatives for Hagel

NEW: Hagel says he regrets some past comments; struggles at times under conservative pounding NEW: Obama administration official says Hagel had some difficulty, but "we think he's on his way" Republicans hone in on Iran, [...]

14 killed in blast at offices of Mexican state oil company

NEW: Mexico's president tours the scene of the explosion 14 people were killed and at least 100 are injured, interior minister says Rescuers are searching for people trapped in the building Witness: "People were screaming. ... You could see pieces of [...]

Ray Lewis' past haunts present

ideo - Breaking News Videos from CNN.com [...]

X Games snowmobiler dies

NEW: Caleb Moore's brother also suffered an accident in the X Games Caleb Moore died a week after a snowmobile crash in the X Games The crash has raised new safety concerns about the games ESPN, which operates the X Games, says it will conduct a thorough [...]

Much of U.S. on a weather roller coaster

In some areas, the difference in high temperatures will change by 40 degrees in a few days Cold air is meeting warm, humid air, resulting in turbulent weather The jet stream's impact on weather seems to be different so [...]