In this October 28, 2015, file photo, a demonstrator holds a sign reading "Free media cannot be silenced" at a protest in Istanbul. (AP/Lefteris Pitarakis)
In this October 28, 2015, file photo, a demonstrator holds a sign reading "Free media cannot be silenced" at a protest in Istanbul. (AP/Lefteris Pitarakis)

Turkey closes at least 20 TV, radio stations