This could be why, lately, I've been putting my exposure to certain news reports at a minimum.  The video below describes some of the capabilities of the B-1B Lancer bomber, including the ability to fly at a very low altitude in defensive maneuvers.  This thing -- a heavy bomber -- literally hugs the ground.  What could go wrong?

September 23, 2018:  U.S. Department of Defense - Pacific Command

U.S. Bombers, Fighters Fly in International Airspace East of North Korea

http://www.pacom.mil/Media/News/News-Article-View/Article/1322205/us-bombers-fighters-fly-in-international-airspace-east-of-north-korea/

Earlier today, U.S. Air Force B-1B Lancer bombers from Guam, along with U.S. Air Force F-15C Eagle fighter escorts from Okinawa, Japan, flew in international airspace over waters east of North Korea. This is the farthest north of the Demilitarized Zone (DMZ) any U.S. fighter or bomber aircraft have flown off North Korea’s coast in the 21st century, underscoring the seriousness with which we take the DPRK’s reckless behavior.