Are our satellite systems safe from attack?

[A Nonny Moose 8,261]

Here is what I hope is a speculative article.

There was at least one Bond film in which the protagonist snatched orbiters in order to start a war.  But what if the geosynchronous communications satellites that the military depend on these days were blown away?

No point in not discussing this.  The cat is out of the bag.

[LexusInfernus 908]

Well the US does have a number of back up satellites on stand by in case one starts to malfunction/gets shot down. Though still, shooting one down does give one an opportunity to attack while the US has more limited satellite back up, meaning a whole bunch of their C3 systems won't work/won't be efficient. 

I'm quite sure that the US is working on something to defend their satellites though, given that its their biggest conventional weakness.