Pakistan’s defense minister says latest clashes with Taliban mean ‘open war.’ What’s happening?

By Sophia Saifi, Masoud Popalzai and Rhea Mogul, CNN (CNN) — Afghanistan and Pakistan are fighting again, trading deadly shelling and mortar fire across their rugged border, with Pakistan’s defense minister saying his country’s patience had “run out” and declaring “open war” on its Taliban-run neighbor. It’s the latest flare-up in an on-off conflict that