The Dallas police chief announced on Thursday that Officer Bryan Riser was arrested and charged with two counts of capital murder, after a witness said Officer Riser instructed him to kill two people in 2017.

Washington remained quiet on Thursday, despite warnings of more potential violence following the Jan. 6 Capitol siege. Mayor Muriel Bowser warned residents to stay vigilant.

On Thursday, Jerome H. Powell, chair of the Federal Reserve, delivered a promising outlook on unemployment numbers, despite the current volatile economic market.

Gov. Kay Ivey of Alabama on Thursday said she would keep a statewide mask order in place until April 9, breaking with Republican governors who planned to end mask mandates against the advice of health officials.

In his first public remarks since allegations of sexual harassment rocked his administration, Gov. Andrew M. Cuomo of New York said he was sorry for his actions, but that he would not resign.

Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, warned against loosening coronavirus restrictions on Wednesday. This comes after Texas announced on Tuesday that it would lift its mask mandate.

D.C. National Guard Commander, Maj. Gen. William J. Walker, testified on Wednesday that he was not given the approval to mobilize troops during the Jan. 6 assault on the Capitol until hours after his initial request.

On Tuesday, the country singer Dolly Parton received 'a dose of her own medicine,' a shot of the Moderna vaccine, which she helped fund when she donated $1 million to Vanderbilt University Medical Center.

A tractor-trailer slammed into the side of an S.U.V. on a Holtville, Calif., highway Tuesday. Area hospital officials said that more than a dozen people are dead as a result of the collision.

On Monday, Homeland Security Secretary Alejandro Mayorkas discussed efforts to revert immigration policies laid out by the Trump administration, including those involving children.