Lessons: Node placement

Best node placement for protection against the AS-level adversary is in ASes that have the most links to other ASes: tier-1 ISPs.

A given transaction is safest when Alice, Bob, or both are in tier-1 ISPs.

With US-based Alices and Bobs, adding a far-flung node (e.g. in Asia) _hurts_ us, not helps.