A federal judge has overturned a ban on undercover filming at Idaho factory farms, ruling the so-called “ag gag” law violates the right to free speech. The agricultural industry had successfully lobbied for the law in 2012 after animal rights activists filmed animal cruelty inside Idaho’s dairy farms, including workers kicking cows and dragging them with chains attached to their necks. Activists say they hope the ruling will lead to similar laws being overturned in states like Iowa, Utah and North Carolina.