▁armed ▁with ▁the ▁W U - 1 4 , ▁a ▁hyp erson ic ▁gli de ▁vehicle ▁that ▁has ▁been ▁successfully ▁tested ▁six ▁times ▁by ▁the ▁Chinese . ▁Similar ▁efforts ▁by ▁Russia ▁led ▁to ▁the ▁K hol od ▁and ▁G LL - 8 ▁Ig la ▁hyp erson ic ▁test ▁projects , ▁and ▁more ▁recently ▁the ▁Yu - 7 1 ▁hyp erson ic ▁gli de ▁vehicle ▁which ▁can ▁be ▁carried ▁by ▁R S - 2 8 ▁S arm at . ▁ ▁In ▁the ▁early ▁ 2 1 st ▁century , ▁boost - g lide ▁became ▁the ▁topic ▁of ▁some ▁interest ▁as ▁a ▁possible ▁solution ▁to ▁the ▁Prom pt ▁Global ▁St rike ▁( P GS ), ▁which ▁see ks ▁a ▁weapon ▁that ▁can ▁hit ▁a ▁target ▁anywhere ▁on ▁the ▁Earth ▁within ▁one ▁hour ▁of ▁launch ▁from ▁the ▁United ▁States . ▁P GS ▁does ▁not ▁define ▁the ▁mode ▁of ▁operation , ▁and ▁current ▁studies ▁include ▁Advanced ▁Hyp erson ic ▁We ap on ▁boost - g lide ▁war head , ▁Fal con ▁HT V - 2 ▁hyp erson ic ▁aircraft , ▁and ▁sub marine - launch ed ▁miss iles . ▁The ▁W U - 1 4 ▁would ▁be ▁similar ▁to ▁these ▁weapons . ▁Hyp erson ic ▁G lide ▁Ve h icles ▁could ▁be ▁used ▁for ▁deliver ing ▁quick ▁nuclear ▁dec ap it ating ▁strik es . ▁ ▁Lock he ed ▁Martin ▁is ▁developing ▁the ▁hyp erson ic ▁AG M - 1 8 3 A ▁Air - Launch ed ▁Rap id ▁Response ▁We ap on ▁AR R W .