When under attack, Europe's leaders fall back upon 60 years of peace in Europe.

BBC: EU Nobel peace prize: No minor achievement

So instead, Republicans will fall back upon a Plan B, basically a series of stunts.

CNN: GOP won't deal, health care law won't change

The point though is that the act of violence is still open to dispute centuries later, and many people tend to fall back upon emotional rather than factual certainty.

BBC: Boston's past lessons on the truths people believe