The Boston Marathon bombers were Chechen brothers shaped by the same jihadist culture that produced some of the fiercest fighters U.S. troops encountered in Iraq and Afghanistan.

Putin has strategically integrated Chechen Islamists into Russia's military expansion strategy. Russia is already telling captured Ukrainian soldiers they'll be forced into its army to help conquer the rest of Europe.

The jihadist ideology behind the Boston attack is now being weaponized in Putin's westward imperial push.