It is tough life you're leading if you're US Ambassador to the UN Samantha Power. Invariably when you're not running over African children you are working yourself into moral outrage over governments with far less to answer for than your own.

But how do you accomplish that? Simple, all it takes is a wild imagination and a healthy dose of hypocrisy:

To the Assad regime, Russia, and Iran – three Member States behind the conquest of and carnage in Aleppo – you bear responsibility for these atrocities.

By rejecting UN-ICRC evacuation efforts, you are signaling to those militia who are massacring innocents to keep doing what they are doing. Denying or obfuscating the facts – as you will do today – saying up is down, black is white, will not absolve you.

When one day there is a full accounting of the horrors committed in this assault of Aleppo – and that day will come, sooner or later – you will not be able to say you did not know what was happening.

You will not be able to say you were not involved. We all know what is happening. And we all know you are involved.

Aleppo will join the ranks of those events in world history that define modern evil, that stain our conscience decades later. Halabja, Rwanda, Srebrenica, and, now, Aleppo.

To the Assad regime, Russia, and Iran, your forces and proxies are carrying out these crimes. Your barrel bombs and mortars and airstrikes have allowed the militia in Aleppo to encircle tens of thousands of civilians in your ever-tightening noose. It is your noose.

Three Member States of the UN contributing to a noose around civilians. It should shame you.

Instead, by all appearances, it is emboldening you. You are plotting your next assault.

Are you truly incapable of shame? Is there literally nothing that can shame you?

Is there no act of barbarism against civilians, no execution of a child that gets under your skin, that just creeps you out a little bit? Is there nothing you will not lie about or justify?