Mexico is awash in violence. And the country’s stringent gun control laws aren’t helping. On Feb. 22, the Mexican military carried out an operation that killed Nemesio Oseguera Cervantes, nicknamed ...

Last October in Laredo, a K-9 caught the scent of gunpowder. Following the dog’s lead, federal agents entered a trailer and pulled down a false wall of plywood. There lay hundreds of deadly weapons, ...