“Does anyone remember?”…AARO and orbs

Does anyone remember a briefing that AARO gave stating that there are numerous cases of metallic orbs in our atmosphere and we don’t know who or where they come from? This was before the Mosul orb. I’m trying to find an article or post on it but can’t seem to find it.

This was such a significant statement that just got downplayed and forgotten about which seems so odd. Surely the defence department should be probed to investigate them further, but instead they were just swept under the carpet and forgotten about.