The largest police union in the US is urging Amazon to remove a t-shirt that reads “Bulletproof: Black Lives Matter” from its online marketplace. In an open letter to Amazon's chief executive, Jeff Bezos, the Fraternal Order of Police (FOP) said Wednesday that the t-shirt, sold through the website by a third-party vendor, is detrimental to the rebuilding of trust between police and black communities. Recommended: How well do you know #BlackLivesMatter?