Launched an attempt to overthrow the elected civilian government of turkey, an important u. S. Ally and a member of nato. The u. S. Has a Major Air Force operation there with about 1,500 airmen at the incirlik air base. Turkey is important in the fight against isis in neighboring syria. Tonight the turkish president is calling for citizens to fill the streets to beat back the coup. Troops have taken over the airport, television stations and bridges in istanbul, and this is where we find Holly Williams tonight. Reporter scott, this coup or attempted coup, we still dont know what it is, unfolded very quickly here tonight in turkey. Here in istanbul, turkeys biggest city, there are troops and tanks on the streets. Theyve blocked the citys two main bridges. Theyre at the airport. They seem to have taken over a turkish state television. And both here in istanbul and also in the turkish capital ankara, weve repeatedly had military jets flying very low overhead. Here in istanbul, weve also re