The following exert is an eye witness statement. Please read into it what you will. This has been reported to mufon who I am sure are investigating:
I was riding as a passenger heading north on washington st. toward spring ave. in oak brook, il. my girlfriend was driving and stated, “is that a plane, it’s not moving”. i looked up and saw a black triangular craft in the sky at a relatively low altitude (maybe 1000-2000 ft) it slowly drifted maybe 100 yards to the southeast over the course of about 1 minute then just dissapeared completely.