2 a/c fly the round the world VIP trips all winter, both a/c reconfigured to 88 business class seats, crews do whole trip which can be up to 29 days, crews have to apply to do trips and go through special training prior to departure, a/c has on board chef, Dr, engineers, tour leaders, special guest & speakers etc some trips are round the world, some are more continent specific, some are supported or on behalf of specific organisations ie Four Seasons, Nat geographic etc. some depart from Sanford or Washington or Luton in UK, very pricey a lot of guests arrive at departure airport in exec jets so these people are wealthy.