The US has indeed accidentally armed ISIS militants. A video uploaded by the militants appeared to show them rifling through grenades and other items from a supply drop intended for Kurdish fighters defending Kobani; the AP reports that the Pentagon has today confirmed ISIS got a bundle. Of the 28 supply bundles dropped on Monday, two were blown off course by wind. One was destroyed, the other grabbed by ISIS. It contained small arms, grenades, medical supplies, and ammunition, which a Pentagon rep says aren’t substantial enough to give ISIS an advantage.