Every nation that can put a satellite in orbit can shoot another one down with the method that the chinese used.
They launched a (ballistic) missile which made a rather hard rendevous with the target. Almost the same procedure like when a freighter makes a flight to the ISS. Only that the freighter slows down before meeting with the ISS...
Here's a site with some VERY interesting information. Check out towards the bottom the video "Download HD Video of Chinese ASAT Test"
http://celestrak.com/events/asat.asp
I imagine if the space station gets tagged with debris from the ASAT test someone might get a bit pissed (although not in a war-starting way I'd think)
Why would the Chinese take out GPS? What system will their precision weapons use to hit their targets?
(They use GPS just like we do)
There are 2 alternate systems to GPS, the Russian Glonass and the galileo being built by the Euros.
Washington would attack EU satellites during a chinese standoff ?
http://uplink.space.com/printthread....11&type=thread
I think US armed forces are much more reliant on precision weapons and therefore GPS than Chinese. So shutting it down would certainly benefit them. But shooting "down" GPS satellites is still impossible; they are over 20000 km away, and this missile can't reach even 1000km.