Yes, we know: it hasn’t been confirmed to be an Islamic terrorist attack, yet. But its hardly likely to be anything else, is it.
And as for the graphic content: we believe people should always be shown reality. F*ck Political Correctness.
The image shows the devastation on the American streets a few minutes after the explosion. At top left, an American man lays in shock. The blast ripped his leg off. His shin bone can be clearly seen protruding from the stump.