Hello, kids. Love isn’t the only thing in the air today. We’ve got what you crave when it comes to the good, the bad and the utterly deranged in all things martial arts. And there’s a lot of each. As ...

KIEV, Ukraine—Dusk envelops a Kiev industrial estate. A man in military camouflage brandishes a knife and lunges at Aleksandr Maksimtsov. Two seconds later, the attacker is pinned to the ground, his ...