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Yak-141 VSTOL in limbo, damaged aircraft rebuilt - After crash two years ago
Y-12 cerhfication a case study for FAA - U.S 'shadows' development by evaluating reporting system
X-prize team announces commercial lunar probe
X Prize competition is more than a race for space
X-numbers hint at eurocopter production evolution
XMM unveils Coma Cluster - Mosaic of 12 independent observations
Xiamen Airlines' 787s are economic growth tools
Xerox shows AWACS displays - Designed to replace CRTs
XCOR refines aerodynamic design of Lynx suborbital launch vehicle
XCOR projects billion-dollar annual market for space tourism, launch services emerging in five years
XCOR Aerospace completes its first test fire of 5K18 liquid-oxygen and kerosene rocket engine
X-56 integrates flight control, flutter suppression
X-51A team waiting to see whether largely successful first launch will unlock further funding