Given that Qatar is not a state party and that Qatar has invited the Sudanese president, and he would very likely be using his personal jet, I see no risk at all in him traveling there."

VOA: standard.2009.03.23

Etiquette applies to all business jet passengers, but especially to middle managers accompany their C-level colleagues.

FORBES: 11 Rules Of Thumb For Flying With The Boss

He was soon assigned to an all-jet squadron, making his first flight in an F9F-2B Panther on January 5, 1951.

FORBES: Neil Armstrong's Immortal Footprint

The ash sandblasted all the surfaces of the aircraft and caused all four jet engines to cut out when the melted ash coated their interior.

BBC: Volcanic ash air shutdown the 'right' decision