Timothy Parsons, a legal staffer at the U.S. Attorney's Office in Washington, D.C., is facing federal criminal charges in Maryland, where he lives, three sources said.

The tiny nucleus of the comet (not visible) is surrounded by a bright halo of gas known as the coma. A long tail stretches away from the comet, and we see hints of rays, jets, streams and filaments.

Material 3 Expressive is best when things move; dismissing apps, adjusting the volume slider, or opening the Quick Settings menu all give a strong sense of the expressive design that forms the ...