The Casper, Wyoming Star Tribune has this story:
A gunman retreated from a Casper nail salon last week after realizing one of its customers was packing heat.
Police say about 5:30 p.m. on Dec. 3, a man walked into Modern Nails at 2645 E. Second St. and asked a female employee if she wanted to buy some diamonds. The man walked toward the front desk area and the woman replied that she had no money to buy diamonds.
A witness said the man then reached into his coat pocket and began to take out a silver-colored pistol.
At that moment, a woman who was getting her nails done reached into her purse and got her own firearm. Police say the man never fully raised the gun and left the building after seeing the customer had her weapon out.
Does your state allow concealed carry permits?
Hat tip http://weaselzippers.us/2012/12/17/narrative-fail-woman-carrying-concealed-weapon-at-nail-salon-stops-armed-robbery/