I think I found the location of the Marine One Q proof picture dropped in drop 3765.

Drop: https://qmap.pub/read/3756

Location: https://www.gettyimages.co.uk/detail/video/president-donald-trump-boards-the-marine-one-helicopter-news-footage/1137592275

https://www.gettyimages.co.uk/detail/video/with-u-s-president-donald-trump-on-board-the-marine-one-news-footage/1137592207

Seems to match! Even has Dan On board.