She finds him in San Francisco. She can't kill him, of course, because it's not yet time for that to happen: but the way that happens is more interesting than I was expecting. She's given the power to kill him, sure, but wouldn't sure rather use the time saving her fellow X-Men from the giant mutant-killing robots that have been brought through time from the distant future year of 2013?
Yes. Yes, she would.
There's a lot of property damage to deal with, and the X-Men decide to stay for a while to clean up the mess - starting their long association with that city (well, after a flying visit in #49).
This is Magneto's first official mission with the X-Men now that Xavier has gone. He is able to operate Cerebro to try and find Rachel - but it's not working too well because of him earlier messing around with the Earth's magnetic field. (I suppose that's how there got to be so many mutants without the X-Men noticing?)