The cache is not at the posted location. However, it is close to a type of location is popular for cache placement and also looks to be pretty close to where the actual incident occurred (based on the video hyperlinked below).
The Incident
On October 28, 2014 at approximately 19:45, a witness described a bright green light flying around Plaza Del Mercado in Silver Spring, MD.
I just saw this evening with 2 other people this "flying object", it was flying there for 10 minutes but unfortunately when I remembered that I had my iPad to film it, it didn't reappear. It was a bright green light that caught our attention. It was flying UP and DOWN, from LEFT to RIGHT and it looked like it turned around itself (if that makes sense...) Going really HIGH and then coming DOWN again...
A video of the encounter (only lasting a few seconds) can be found here. Because embedding youtube videos is harder than it seems.
Obviously, I cannot confirm whether this incident actually happened. However, I can confirm that over a span of several years, more than one incident has been reported in this general area....
The Cache
The cache can be found close by at the following location:
Conrad, Young, Null, Shepard, Bean, Bean, Aldrin
Null, Scott, Scott, Null, Aldrin, Irwin, Irwin, Young
You're looking for a magnetic nano so bring your own pen.
I'm starting this at a 2 difficulty and have not included a geochecker link. If it appears that I've over/underestimated the difficulty, I'll adjust that.