Wildfire smoke and unhealthy air persist and shift direction, as Trump demands explanation from Canada.

Two U.S. service members were killed in action while "partner forces defended against Iranian ballistic missile and drone attacks," U.S. Central Command said Saturday.

Tune into World Cup coverage, and you are likely to see waves of male, screaming, sweaty fans. But one of the joys of covering this World Cup has been speaking to women who love soccer.

U.S. presidents have promised short, decisive wars in Afghanistan, Iraq and Iran. All have proved much more difficult than advertised and fallen far short of the political goals set at the beginning.

Retired pilot Chesley "Sully" Sullenberger is known for safely landing an airplane on the Hudson River in 2009. This week, he announced that he has Alzheimer's disease.