Above a packed stadium in Pittsburgh, NASA's jets traced a new kind of boundary — not between nations, but between the familiar and the infinite. The space agency's inaugural NFL flyover during the Steelers' home opener was the opening gesture of a deliberate partnership with professional football, designed to carry the idea of space exploration into the lives of millions who might never have sought it out. In an age when public institutions must compete for attention alongside every other force in culture, NASA is choosing to meet people not at the launchpad, but at the fifty-yard line — trus