Indeed, many of the logos shown will probably mean nothing to most of the traveling public - we doubt many non-travel people know or care what ITA, Sabre or Amadeus are!
Despite the risk from old-fashioned ground fire, particularly in narrow valleys, a ride in a chopper is still better than land travel on ambush-ridden or non-existent roads.
Persons with existing medical conditions who might require hospitalization should consider deferring non-essential travel to Angola, particularly to Uige Province.