I'm not comfortable sharing details because they can be traced back to specific people and events, but I've seen people doing highly-skilled high-demand tasks u

I'm not comfortable sharing details because they can be traced back to specific people and events, but I've seen people doing highly-skilled high-demand tasks under alcohol influence "to calm their nerves". MH17 was shut down because the radar operator could not read his screen / correlate with other sources of information regarding civilian flights. Can tell you a bit about how professional those operators were.