There's no shortage of horrifying stories from last Friday's terrorist attacks in Paris. But one image tweeted out this afternoon manages to bring home a visceral sense of the brutal reality. Shared by BBC news correspondent Christian Fraser, it shows a segment of the bulletproof shield used by Paris police to storm the Bataclan concert hall when it was being held by militants. The shield, identified as a "Ramses" (see below), is obviously a serious piece of hardware. And it was obviously totally necessary.

Sources: Christian Fraser | Reddit | RAID