Things tend to get pretty dicey, even deadly, during periods of heightened tension here in our nation’s capital. Just over a decade ago, not long after the 9/11 attacks, we had the Beltway Snipers and “Tractor Man.” More recently, helping to set the tone for these days of partial government shutdown/standoff over Obamacare, it’s the Navy Yard shooter, crazy Miriam Carey, and the latest entrant, yesterday’s self-immolation guy, who set himself completely on fire on the National Mall until nearby joggers raced over and used their shirts to extinguish the flames. How many readers remember Tractor Man? He caused much...