▁ 6 - month ▁" proof ▁of ▁principle ." ▁ ▁European ▁routes ▁European ▁routes ▁origin ate ▁at ▁the ▁Baltimore ▁International ▁Airport ▁in ▁the ▁United ▁States , ▁stop ▁in ▁Europe , ▁then ▁continue ▁on ▁to ▁South west ▁Asia ▁before ▁returning . ▁ ▁Space - A ▁travel ▁is ▁not ▁allowed ▁on ▁routes ▁to ▁and ▁from ▁combat ▁zones . ▁ ▁In fl ight ▁service ▁In fl ight ▁service ▁on ▁board ▁P E ▁fl ights ▁is ▁similar ▁to ▁that ▁on ▁normal ▁commercial ▁aircraft , ▁providing ▁such ▁amen ities ▁as ▁business ▁class ▁me als , ▁infl ight ▁mov ies , ▁sn acks , ▁and ▁reserved ▁se ating . ▁ ▁Several ▁of ▁the ▁changes ▁were ▁made ▁in ▁ 2 0 0 3 ▁in ▁an ▁effort ▁to ▁attract ▁more ▁passengers ▁to ▁the ▁program . ▁ ▁Draw down ▁At ▁one ▁point ▁the ▁P E ▁system ▁handled ▁over ▁ 3 4 0 , 0 0 0 ▁passengers ▁a ▁year , ▁with ▁more ▁than ▁two - third s ▁of ▁the ▁seats ▁on ▁the ▁contract ed ▁aircraft ▁filled ▁by ▁passengers ▁on ▁P erman ent ▁Change ▁of ▁Station ▁orders . ▁In ▁ 2 0 0 5 , ▁cit ing ▁cost , ▁flex ibility ▁and ▁empty ▁seats , ▁the ▁Department ▁of ▁Def ense ▁began ▁to ▁scale ▁down ▁P E ▁service ▁over ▁a ▁period ▁of ▁several ▁years . ▁ ▁Fl ights ▁to ▁South ▁Korea ▁and ▁Ok ina wa ▁were ▁elimin ated ▁and ▁other ▁routes ▁reduced . ▁ ▁This ▁required ▁serv ic em embers ▁and ▁their ▁families ▁to ▁take ▁commercial ▁fl ights ▁to ▁and ▁from ▁the ▁affected ▁locations