NASA's Kennedy Space Center in Florida observes U.S. Constitution Day, the official birthday of our U.S. government, with the theme "Freedom Needs Space." A remembrance poster made appearances in various locations around the multi-user spaceport, including on the crawlerway, as the mobile launcher, atop crawler-transporter 2, in the background, slowly moves off of Launch Pad 39B for its trip to the Vehicle Assembly Building. Constitution Day is an American federal observance. It recognizes the adoption of the U.S. Constitution and those who have become U.S. citizens. Constitution Day is observed on Sept. 17, the day in 1787 that delegates to the Constitutional Convention signed the document in Philadelphia.