This is one of the no-brainer solutions that NASA could have begun developing by the 1980s, had Ronald Reagan not diverted vast finances from moon development and exploration, and put them into the biggest waste of commercial money of all time - the 'Star Wars' laser-weapons project. Which everyone's taking about nowadays. I was six at the time of the first moon-landing, and not unreasonably assumed that by now, I'd be up there! Anyway, that grumble aside, it's a welcome step forward, and the quicker the better. There's a whole sea of titanium ore up there, just waiting to be dug...