X2: X-Men United2003

Magneto:
His name is Colonel William Stryker, and he invaded your mansion for one purpose; he wanted Cerebro, or enough of it to build one of his own.

Dr. Jean Grey:
But that doesn't make any sense. Stryker would need the Professor to operate it.

Magneto:
Which I think is the only reason my old friend is still alive.

Storm:
Oh my God...[She, Jean and Magneto exchange worried looks]

Wolverine:
What are you all so afraid of?

Magneto:
While Cerebro is working, Charles's mind is connected to every living person on the planet. If he were forced to concentrate hard enough on a particular group-let's say, mutants, for example-he could kill us all!

Storm:
[coldly] Wait a minute. How would Stryker even know where to find Cerebro in the first place?

Magneto:
[ashamed] Because I told him. I helped Charles build it, remember? Mr. Stryker has powerful methods of persuasion, even against a mutant as strong as Charles.

Jean Grey:
So who is this Stryker, anyway?

Magneto:
He's a military scientist. He spent his whole life trying to solve the 'mutant problem'. If you want a more intimate perspective, why don't you ask Wolverine? [to Wolverine] You don't remember, do you? William Stryker: The only other man I know who can manipulate adamantium. The metal on your bones. It carries his signature.

Wolverine:
But the Professor-

Magneto:
The Professor trusted you were smart enough to discover this on your own. He gives you more credit than I do.