Ratcheting up the rhetoric in his recently declared war on guns, Mayor Bloomberg yesterday accused lawmakers who kowtow to the gun lobby of being cowards. Bloomberg continued an assault begun on Inauguration Day during his weekly radio show, tearing into Washington pols for limiting the scope of the National Tracing Center of the Bureau of Alcohol, Tobacco, Firearms and Explosives. "It shows the power of one advocacy organization and, I would argue, the cowardice of... (GunPolicy.org)