I was once on an assignment to photograph a foreign politician in a foreign country. I was shooting for a Japanese magazine in a Pacific country.
The politician was shot, murdered by the military on the tarmac of the airport, and I captured the whole thing on film. (nobody had imagined that this was going to happen) I was about 10 feet away.
A young soldier saw me photographing, and pointed his rifle at me and was going to shoot me. I shook my head "no", opened the camera, pulled out the film, exposed it all to light, and threw it on the ground. Then I also dropped the camera on the ground and raised my hands, palms outward.
A military officer saw me do that. He looked at me a long time (it seemed a long time), looked at the young soldier aiming at me, looked at me again. Finally, he gestured to the soldier to lower his rifle, and said to me "go".
I went. I forced myself to walk slowly and quickly disappeared into the crowd. I trembled uncontrollably after I was out of danger.