possible strategy could be russian air strikes on key infrastructure targets in and around kiev. authorities have identified 5,000 possible bomb shelters in the city of 3 million. some of them indeed dusted off cold war relics. take a look. this is just one of several bomb shelters in this apartment complex in northern kiev. in the event of an invasion this is home. it is a little bit rough. the bomb shelter we checked out is said to handle 60 people if a bombing strike looms. there is a siren that will warn residents. he has electricity but not much more than that. the place will be stocked with food, water, medical supplies and could be the key to the local survival. take a listen. >> the most important thing is our lives. it is important to save lives. we'll do the best we can. >> as we were leaving, dana.