We'd have to have something already parked in Earth orbit, and it would have to be good to go, and would have to be really, really fast, and the calcs for intercept would have to be right on the nose. IOW, not as easy as one might like. :^) Since we've had two in a couple years, I'd not be surprised if we get more interstellar samples, soon, than we know what to do with, or care to have.
Flood, Fire, and Famine
in the History of Civilization
by Richard Firestone,
Allen West, and
Simon Warwick-Smith
