Stocks tumbled, then partially rebounded, this week after once-promising trade talks with China stalled. Strong holiday spending has buoyed the economy while other lackluster indicators portend an uncertain future. NPR’s Scott Horsley takes a close look at the economy. Also, we talk to Here & Now’s transportation analyst Seth Kaplan about the “tarmac rule,” a regulation that has unintentionally led to an increased number of flight cancellations.