If you play Counter-Strike, you’ll realize it pays off to spend some time learning the maps. More than that, knowing where to provide concealment and actively destroying your enemy’s line of sight, or ...

Ten days ago, a murky blanket of Mexican smoke covered much of Texas and painted the sky a milky gray. On April 15, a dry cold front pushed the smoke over the Gulf of Mexico and replaced it with a ...

(CNN) — Air quality is taking a hit in parts of the central and eastern United States as smoke from out-of-control wildfires in Canada pours south – but that isn’t the only thing millions of people ...