UFO Shoots Over Miami, Florida Seen By Thousands, Panics City, Sept 2015, UFO Sighting News.

Date of sighting: Sept 2015
Location of sighting: Cape Canaveral, Miami, Florida, USA
News: http://www.9news.com.au/technology/2015/09/03/15/55/rocket-launch-creates-ufo-like-light-display

NASA may or may not have launched a rocket, that is not the issue here. The issue is that this object in the sky is not flying out of Earths atmosphere, but instead is fly horizontal to the ground like a UFO will do. So the sightings was so enormous that NASA had to contain it by saying they are responsible for it. NASA never does that, unless its a matter of national security. What we are seeing here is an alien craft. 
Scott C. Waring

News states:
For astonished onlookers it seemed like a UFO, an alien phenomenon lighting up the skies in Florida. But though a massive teardrop-shaped light did come from a spacecraft, the explanation is far less exciting than the spectacle. The stunning bubble was actually the trail of an Atlas V rocket being launched from Cape Canaveral about 6am yesterday local time. If you look closely, you can see the rocket itself as a tiny speck at the front of the spectacle. The smoke trail was illuminated by the rising sun, creating a brilliant sight above a nearby airport, where it was filmed by traveller David Lopez.