Egypt’s first democratically elected government has been overthrown and the military is back in power — less than two years after a popular uprising led to President Hosni Mubarak’s ouster.

The Muslim Brotherhood is once again being driven underground, its members killed and arrested in an army-led campaign to wipe it off the map.

In Egypt in Crisis, FRONTLINE and GlobalPost correspondent Charles M. Sennott traces how what began as a youth movement to topple a dictator evolved into an opportunity for the Muslim Brotherhood to seemingly find the political foothold it had sought for decades — and then why it all fell apart.

How did the revolution go wrong? Was the Muslim Brotherhood ever really in charge — or was the “deep state” in control all along? And is there any hope for democracy in Egypt? Will the military ever allow it?

We’ve asked Charles Sennott, as well as Marcela Gaviria, one of the film’s producers, to join us in a live chat to answer those questions — and take yours. They’ll be joined by special guest questioner Ayman Mohyeldin, a foreign correspondent for NBC News based in Egypt.

You can leave a question in the chat window below, and come by at 3 p.m. ET on September 18 to join the live discussion.

We’d like to thank GlobalPost and NBC News for partnering with us on today’s chat.