This story is published in partnership with The Trace, a nonprofit newsroom covering gun violence. Subscribe to its newsletters. As gun sales have dropped over the last four years, the firearms ...

The D.C. U.S. Attorney’s Office is ramping up its efforts to link suspects to illegal guns found in homes, cars and backpacks, filing search warrants for DNA and using multiple labs to get it tested.

Olympic biathletes shoot at targets using .22-caliber rifles while racing on cross-country skis. Here’s a closer look at the ...