In almost every instance, Arming the Heavens comes down against space-based kit to do each of the given jobs, suggesting either that the task isn't necessary, isn't doable or that terrestrial gear could do it more cheaply. The only space kit which gets a qualified thumbs-up is cheap decoy satellites among which useful American comms, nav and spy birds could hide from enemy sat-kill strikes. The full text of the report is available here (128-page pdf) for those interested.
It looks as though jobs in the future US Space Navy* may remain hard to come by for a while, based on Kosiak's analysis. Very right and proper, no doubt, but still mildly depressing for the science fiction buffs among us. ®
*Past and present-day astronauts/cosmonauts usually have to spend a long time aboard cramped orbital structures such as Mir and the ISS in order to make their launch costs worthwhile. Assuming that any large human presence was required by the US space forces of the future, their lifestyle would probably be far more like being in the navy than being in the air force. On the other hand, if the people spent their time mainly at ground stations, a better name might be US Space Force/Aerospace Force etc.
Nukes? It's space, let's just drop things on them
Deorbiting tungsten rods onto targets at 5km/s? I'll take one of those, please.
As Plato once said...
"How Ironic that the greatest forge of civilisation is war."
Bring on the space race, i say!
To be fair
...some of the fastest development of technology could arguably be attributed to the Cold War arms race. A space weapon cold war would undoubtedly spur on the same rapid development, in a way that civilian spaceflight could never hope to.