ORLANDO, Fla. (AP) — A Chechen immigrant who was being questioned about his ties to one of the Boston Marathon bombing suspects was shot to death by authorities early Wednesday after he lunged at an FBI agent with a knife, officials said.

WASHINGTON (AP) — Michelle Obama said Wednesday that stories of toil and sweat by slaves once held at a historic home within sight of the White House are an important part of U.S. history, including her own personal story, and are "as vital to our national memory as any other."

BISMARCK, N.D. (AP) — A dam that threatened to give way and flood a North Dakota town was holding back the water on Wednesday, though the 1,300 residents of Cavalier were still being told to stay away from their homes.