Medary.com

We learn today that a plot to destroy a New York City tunnel has been disrupted by the FBI:

The Daily News reported that the plotters wanted to blow up the Holland Tunnel, the southernmost link between Manhattan and New Jersey, in the hopes of flooding New York's financial district. The desired effect would be akin to the flooding that ravaged New Orleans in the wake of Hurricane Katrina, the newspaper said.

A government official with knowledge of the investigation said while the alleged plot did focus on New York's transportation system, it did not target the Holland Tunnel. The official, who spoke on condition of anonymity because the case is ongoing, would give no further details about the intended targets.

It's unlikely that any plan to flood the financial district would work because it is above the level of the Hudson River.

Fortunately, most of the barbarians are, in addition to being dangerous, intensely stupid and inept.  Counting on that to continue forever into the future would however be a very deadly mistake.