Meters below the surface, about a mile and a half down. it does really glide. that is not nemo, for captioning sponsored by cbs dokoupil: tonight, the taliban closes in on afghanistan s capital, now just 50 miles from kabul as u.s. troops arrive to evacuate some embassy personnel. supply lines to kabul are blocked, afghan troops surrender, some executed. we are certainly concerned by the speed with which the taliban has moved. dokoupil: the threat to the u.s.: we asked former senior c.i.a. official michael morrell what s the biggest risk americans face as a taliban grip on afghanistan tightens. additional covid shots have just been authorized, but who will get them and when? what you need to know. delta s summer spread: vaccinations are up, but so is covid transmission in nearly every state.