There have been 2 separate reports of the same incident in Denver, Colorado, USA 2021. Both report three objects slowly falling from the sky, leaving a trail, and then when close to the ground, they change direction and move away.
Witness 1 states "I was having my morning coffee, i generally look out my window while i'm
doing that. i looked up and i asked my friend if they could see that
weird smoke trails. the trails were long at first and you could see that
there was a direction change in the upper atmosphere. as it got lower
to the ground, i would say within 1,500 feet, they slowly started
changing directions and started heading east toward buckley air force
base. there was no sound, no odor no strange electromagnetic sensations.
these objects did not appear to be in a hurry and they maintained a
straight heading. had i not looked at them directly, i probably would
have imagined them to be a chemtrail coming from an aircraft. however
all three of these maintained a perfect formation until they're out of
sight."
Witness 2 provided some video and states " I observed 3 large white objects traveling at a high rate of speed.
they maintained their formation and had long tails. the best
description is that they looked like cloud tear-drops.
10:45 in the morning and no clouds in the sky- and i observed these very
large objects appear to "fall" then move east at a high rate of speed.
they maintained their brightness and formation unitl i lost sight of
them due to trees and buildings.
my sister is the past vp of mufon in mo, btw- and their team of video
experts is analyzing this as well."
Both witnesses made independent statements to MUFON.
Analysis
These are most intriguing objects. At first glance, they look like falling space debris. However, we see the contrail that is left shows the objects path, and all three show a gentle curve to the right.
We can also see that the three objects seem very similar, if not identical in appearance, all showing the same flat front edge and exactly the same contrail structure.
Space debris or a meteorite would certainly fall at a faster rate then these objects, so perhaps they are under some kind of controlled decent.
We can see that the contrail forms two main trails at each extremity of the object. For aircraft, contrails consist of water vapour from the engine exhausts - could engines be producing these contrails?
Witness 1 claims the objects moved towards Buckley Air Force base - it is interesting that this is home to the US Space command, whose duties include carrying out space surveillance, space communications, space-based missile warning capabilities and support operations.
UPDATE
Other witnesses claim to have seen the same objects but from a different angles. From these angles, it would appear the objects aren't falling at all, but flying normally. Some claim the three objects are just C-17 transport planes and say this is confirmed using a plane tracking site (Adsb exchange).
One slight discrepancy remains - C-17's have 4 jet engines and so you would expect to see 4 contrail trails, whilst the objects in the video and picture seems to only have 2 contrails.
Conclusion - Probably three C-17 Transport planes