barry smitherman is convinced the u.s. will regain its superpower status thanks to gas and oil. and with every barrel pumped out of the ground, that goal comes a little bit closer. >> so often, there are conflicting opinions with some experts warning that the oil and gas reserves that can be reached through fracking are vastly over-estimated. so, the promise of easy access to oil at home may yet prove to be an empty one at a vast cost to the environment. and now we take a peek in a global living room. today we've been invited into the home of nguyen bao and his family in vietnam. nguyen has been living with his wife and two sons in the same place for four decades. here's why. >> hello! i'm very glad to welcome you to our home. please come in. my name is bao, nguyen tuan bao. this is our house. i'd like to introduce my wife, khanh. we've lived here in this house for 40 years, my eldest son lives above us and my youngest below us. this here is a crossbow. an ethnic minority, the muong from hoa binh, made it. they gave me the weapon as a present when i visited hoa binh. in vietname