john roberts took his act on the road to tennessee to bring us this story. ♪ >> tommy shaw, lead guitaristix says this about gibson guitars. >> my source of guitars when i was little was my dream guitar. i still dream of gibson. ♪ >> the music the world agrees gibson in business for over a century, has three domestic factories. two in tennessee and one in montana. >> this company's been around for a long time. it was founded in 1894. >> the one in memphis has daily tours so visitors can see a guitar made practically from scratch. but on november 17th, 2009 someone else showed up at gibson's door. >> mid-morning i get a call that homeland security was raiding our factory. >> gibson ceo henry, a musician himself, has been running the company since 1986. >> i thought it was a joke because, you know, homeland security raiding a guitar factory just makes no sense. >> armed federal agents showed up at gibson's nashville headquarters and their factory two miles away. nashville manufacturing supervisor carlton sanders was on site that day. >> the agents came in and told us to back away from our de