How the US forces internet companies to cooperate on spying, or else

"By wielding a potent legal threat, the U.S. government is often able to force Internet companies to aid its surveillance demands. The threat? Comply or we'll implant our own eavesdropping devices on your network." Declan McCullagh at CNET News writes about the real-time "electronic surveillance" orders the NSA can serve to 'net service providers for investigations related to terrorism or national security.