taking shots at = firing at?
The stress of combat soon bore down. A legal adviser to the Marine unit stopped taking his medication for obsessive-compulsive disorder and stopped functioning.
“We had the one where Marines had photographed themselves taking shots at people,” Col. R. Kelly testified, saying that they immediately called the Naval Criminal Investigative Service and “confiscated their little camera.” He said the soldiers involved received a court-martial.
Note that "taking shots at" in OTHER contexts can mean verbal "shots" designed to intimindate or discredit.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.