Killings at tortilla shop follow extortion protest in Mexico

Extortion gangs have grown so bold in the Mexican city of Celaya that when local tortilla shop owners protested the problem at city hall, gunmen immediately attacked one of their businesses, killing three employees.While gangs have demanded protection money in other parts of Mexico, seldom has retaliation for a public protest been so swift and deadly, and industry officials say tortilla shops have already started closing in the city of about 500,000 people.On Tuesday, Celaya city officials pledg