I'm curious, from a pilot's perspective, how the grounding of US and US-bound planes on 9/11 were handled. Were any of you flying on that day, or otherwise knew how they handled it?

Did every plane get immediately directed to the nearest airport by ATC? Did they explicitly mention the attach on the WTC/Pentagon over the radio, or did they just direct all planes to land?

Who chose the diversion airports for each flight-- FAA themselves, the flight crew, or did the poor airline dispatchers have to pick diversion points, and then notify each and every plane of their airline where they were going to divert?

Also, did planes land overweight, or was fuel dumping allowed if necessary?