Religious leaders of the Metro Industrial Areas Foundation have urged President Obama to use the purchasing power of the federal government to change the firearms industry. Noting that the federal government is the nation’s top gun buyer, they say it can pressure gun manufacturers to sell only to dealers that sell guns responsibly. The government can also press gun makers on gun safety technology. Smart guns should be manufactured that can be fired only by authorized users. Manufacturers who refuse to cooperate should be denied government contracts (New York Times, July 17).