Talk:Jasper Jordan/@comment-26247132-20150726102347/@comment-26247132-20150730010611

Because just like the Sky People had no idea humans had survived on earth, the Grounders had no idea there were hundreds of Sky People alive up in space. The Grounders see Mountain Men frequently but probably haven't seen a Sky Person since the one Lincoln found as a boy. The Mountain Men wear disguises of all sorts as shown in Lincoln's journal so they might have thought the hazmat suits were another disguise and not recognized it as protection.

Yes, there was a Grounder spying on them in 1x02, however, it's up for debate whether it was Lincoln or not.