munitions. what that means is we're able to strike things more efficiently, more accurately with less civilian casualtieies or other casualties in the area. >> but gps satellites also provide presigs timing to the civilian world. space command estimates that some 3 billion people take an action depending on gps every day. >> if you got gas today, that atm system in the gas pump is timed off of gps. the gps goes away, that doesn't work. most of the stoplights in town are timed off of gps. hospitals are interconnected through gps timing sources. every financial transaction is timed off of gps. >> today, there are 24 active gps satellites with a further 10 in reserve, guaranteeing global coverage 24 hours a day, 7 days a week. and yet flying those 34 satellites falls to a tiny team. >> the folks in this one room control all the gps satellites.