We've got a few more steps before it becomes a full aircraft program, but I do envision a demonstrator or 'x' plane in the next couple of years. We're going to need that to establish credibility.

在它成为一个全面的飞机计划以前，我们还有很多步的研究要做，但我能预见到几年后会有一架展示飞机或“X”飞机出现，让我们可以建立起可信度。

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"I am excited to see this, but I am also saddened that the shuttle program has ended and there is nothing in place for the next steps in space, " said Terry Dunn, 64, of Tuxedo, N.

WSJ: A Shuttle Meets Its City

Having set in train his defensive program, Mr. Bush can go to the American people and elicit their support for the next steps initially, the relatively low-cost upgrades to the Aegis system and then, as needed, other complementary and cost-effective anti-missile systems (the most attractive option being space-based defenses).

CENTERFORSECURITYPOLICY: Center for Security Policy | Changed Circumstances in Senate Require Bush to Move Now on Missile Defense