A few days ago I saw a post here on Voat about a man who overheard children crying for help in the museum at Droop Mountain, West Virginia. He tried to get help but he was escorted off the premises by the authorities - as if they were hiding the children.

I can't find that post, but I want to add these 2 maps that I found on Twitter. The 1st map shows a tunnel system under the Greenbrier airport which is near Droop Mountain. The 2nd map is the airport from google maps. The whole area is riddled with tunnels - and of course the tunnels can be extended. It looks like the children could be flown in under cover of darkness and then hidden away underground.

http://i1076.photobucket.com/albums/w442/vcvitamin/Greenbrier%20airport%20tunnels5_zpshurcx52u.jpg

http://i1076.photobucket.com/albums/w442/vcvitamin/Greenbrier%20airport%20tunnels4_zpsbes2y24b.jpg