Grist: You might think the NRA would be busy enough fighting its current battles, fending off crazy ideas like expanded background checks for gun sales. But no. The group is now picking a whole new fight, this one against activists who want to ban lead bullets. Studies have shown that as many as 20 million birds, including endangered California condors, die each year from lead poisoning after ingesting bullet fragments. Ammunition is likely the greatest unregulated source of lead released into the environment,...