How long before we begin using Satellites to police our streets? I personally believe it would make for a great investment in the long run. I'd imagine the technology might not be as up to date as one would like, but NASA (and other eggheads) has made miracles happen before.
A lot of people don't like extra security cameras / big brother type systems because of privacy reasons, but I think that's crap. If you're out in public, then your level of privacy drops.
But could you imagine, someone getting car jacked or mugged. Then the victim describes the incident, address, and time of day. Satellites go through their records and follow the perpetrator to wherever he or she has gone. Obviously this type of thing would be too expensive to for EVERYONE'S crime, but when people find out about it, crime levels would go down. It would have a Superman effect, if people think someone's watching they are less likely to commit a crime.