Barton Gellman

Stuxnet, a computer worm reportedly developed by the United States and Israel that destroyed Iranian nuclear centrifuges in attacks in 2009 and 2010, is often cited as the most dramatic use of a cyber weapon.

You are not going to put 100,000 police officers on the streets overnight and do the right job. To put them on the streets, to see that they're properly trained; you have to do it in an orderly way over a period of time.