UFO Article (Blog): 

“SHAKE, RATTLE, & ROLL: 
Can UFOs Project Force, part two?”

by Dr. Michael D. Swords, 24 May 2013

(The Big Study)

Michael D. Swords presents part two of his report about UFO cases where electromagnetic (EM) effects were noted:

http://thebiggeststudy.blogspot.com/2013/05/shakerattle-roll-can-ufos-project-force.html

The article mentions the 18 October 1973 U.S. Army helicopter UFO incident (the Coyne case) that occurred near Mansfield, Ohio.

Lieutenant Colonel Lawrence J. Coyne,
U.S. Army (youtube.com image)