Me and a friend were in his yard when we saw 2 strange fireballs in the sky just apear out of nowhere. They seemed to be hovering for awhile but then fell behind a treeline pretty far away. Then we saw three more but one looked bigger and they also looked as if they were hovering so we got my friends mom out my dad and his dad and they all didn't know what they were seeing. After a while the three fireballs started to fall behind the treeline and disappeared. After about 10 minutes after my friend and I noticed a lot of planes going twards the direction of the fireballs.