Wayne LaPierre, chief executive of the NRA, speaking  at the association’s annual meeting in Houston, Texas. Photograph: Reuters/Adrees Latif

A voice booms over a PA system calling people to buy a ticket in the “Wall of Guns” raffle. The wall on the first floor of the sprawling George(...)

New York City mayor Michael Bloomberg with US vice-president Joseph Biden (left) and family members of victims of Sandy Hook school shooting. Photograph: Brendan McDermid/Reuters

New York mayor Michael Bloomberg is bankrolling a $12 million advertising blitz in a bid to pressure Congress into adopting stricter gun contro(...)