Loki needs a power source. If we can put together a list...

You ask to disintegrate history. The chronosphere powers the grand clock.

Sources are telling us that Francis Underwood conceded to Governor Conway on the phone only a short time ago.

They fed off trees and shrubs. But, as their food source disappeared, these animals died out.

I think if it were exposed to a sufficiently powerful energy source something very similar to its own signature, perhaps its molecular integrity could fail.

All calls, e-mails, messages in and out of the White House will be monitored and archived. Every phone call will be recorded as we search for the leak. Video surveillance?

Well, we are circling in, we're getting closer. I will tell you, our intelligence community, they are the real heroes. Charlie, if we could get back to my point, my sources confirmed…

The correct answer is when covered by a film of liquid sufficient to reduce the coefficient of static friction between the tire and the road to essentially zero, but not so deep as to introduce a new source of friction.