Transportation Secretary Gestures Vaguely at Copper Wiring to Explain Flight Grounding

If you’ve ever changed your own wiring at home, you know how it goes: one minute you’re jamming all your joined-up wires into a junction box; you’re sure you got everything color-coded and in the right order; and then you flip a switch and all the flights in the country are grounded for four hours, inconveniencing potentially millions of people. Oh…