earthquake in japan. there s the unrest in the middle east. i think the economy has a great deal to do with it. reporter: costco has seen a surge in sales of freeze dried food, and the company underground shelters has had inquiries jump by 4 h00% since e earthquake in japan. this isn t the first time there s been a boom in bunkers. many bomb shelters across the country are home shelters. one chicago company received 1,000 orders in just one week for fabricated steel shelters. nowada nowadays, camden says he sees two types of clients. some of the clients who feel like the threat is imminent and then you have the other clients who are starting to prepare and move forward. reporter: it s impossible to predict if the current demand for bomb shelters will last, but for now a hardened structure by nature is basically asset protection. most people identify their family as their number one