A lawsuit backed by the National Rifle Association has been filed in opposition to Pittsburgh’s new gun-control laws. Four Pittsburgh residents are suing the city, Mayor Bill Peduto and the City Council. The suit says the legislation Peduto signed into law Tuesday infringes on the people’s right of self-defense and will do nothing to prevent mass shootings like the one that killed 11 at Pittsburgh’s Tree of Life Synagogue last fall. City officials say they’ll fight the suits.