I've got to be honest, after reading through this stuff, I still wouldn't like to bet my life on this technology... I've got this horrible feeling we're gonna be hoisted with our own petard one of these days...
Rationally you have to say if lasers are shooting down missiles at 12 kilometers. the SM-3 is shooting down full blown tactical missiles, the GBI has had sucessful intercepts and it's failures are understood, if you have all that then you must conclude that it is working.
To be honest, after reading through this, and reading through the Russian boasts about their next generation of ballistic missiles, it all sounds like international posturing and progaganda to me, and the usual human inclination to make the end of the world nigher and nigher...
Now, if we'd all put our collective efforts into cooperative space exploration, or providing everyone on the planet with fresh water instead of devices to limit collatoral damage to "acceptable losses" in a nuclear war, aye and what then?