[crazygringo]

If the company has no keys to hand over, because they gave them to the Europeans, then obviously that's quite a different situation.

The US can ask. That doesn't mean it gets what it wants. The government loses in court all the time.

[pyrale]

Have you heard of many national security letters successfully challenged in court?

[Permik]

If it's not hand delivered or certified mail, into the trash it goes! :D