Great Stuff

The first challenge was how to pin point a particular place on the earth and target that place with laser guided precise missile. This was evident from gulf war where the tech was used to target places as well as the interceptor missiles which was developed to stop incoming iraqi scud missiles. Precise cruise missiles were used to target osama some time back, then was drones developed to hit moving targets by triggering a small weapon sitting miles away. But the current one of hitting something coming down to earth or rotating in space, this is more difficult as you dont have a fixed co-ordinate value and the missile need to adjust the path and since that in space is colder, its harder to use heat seeking missile as sometimes it may go after some meteor and hit it rather than the intended target. China started this act with precise destroying of old satellite but it has its own cons when the missile hits target, it destroys the target into debris which may pose problems as you are creating more randomness in space. What US showed is a different kind capability, pick up a rogue satellite which is heading down with rapid velocity often at faster speeds. So one has to adjust the path as well as to hit the target when velocity isnt under the effect of gravitational force. China had a more easier task of dislodging a satellite which may be used to destroy satellites .... more to do with spy ones of hostile countries. It can also use its missile to seek out ransoms in future. US on other hand can hit any satellite which may be launched or which may be pushed out from space. Think it as this way, usually countries keep launching satellites and may have hidden payloads which can be later propelled towards countries if something happens. So US technology can be used to develop missile shields to protect allies. Now i can predict technologies sooner which can vary speed and change directions at will which may be hard to target.