So far, no links to a video clip, but this is typical from my search:
Vietnam War History
... Nguyen Ngoc Loan, executing a Viet Cong officer on the streets of Saigon with a ... News
film from the battlefields was by 1968 transmitted from Tokyo via satellite ...
www.vwam.com/vets/turningpoint.html - 8k - Cached - Similar pages
There's a video of it; i'm sure. Maybe this would be a good angle for Rush to use. Towards the end of today's broadcast, it seemed he was thinking about how the MSM would spin the excuse not to run the Berg video.