Like any good pair of twins, Run the Jewels have a freaky sort of unspoken fraternity. When El-P and Killer Mike strode in with their usual uniforms — Mike in a gold chain as thick as a garter snake, El in a fitted Yankees cap and pair of blue-mirrored sunglasses — the two didn’t have to do as much as nod to one another before upending three tracks from their latest LP, RTJ3, in strange and perfect symbiosis in NPR’s Tiny Desk Concert.
