The image of the Castle Romeo bomb testing which is used in the article looks as you can see, very simular to the image of the Red Sprite
The simularities have likely caused the mix up, not just on the website where the article came from but on many other sources on the internet as well, where they vary from sprites to boms to UFO's.
I think the author just used the image as illustration because there wasn't a picture available of the event itself as the Sprite Phenomena is a millisecond event that requires special equipment to photograph
Now we know the origin of these images and have set the record straight on that :)
This post on Facebook was a repost of the news item from this article which i left intact and added with links meant for information about the Phenomena "Sprites" and making the point that
|"things aren't always what they look like"
which still stands and counts double now.
Sharing is multiplying, so share this research and stay alert! :)