having an incredibly hard time even at this hour getting their people inside to finish this search operation. >> yes. and every search is done in a real systemic manner and making sure the building is safe is at the top and utmost priority and getting that information to assure that building is safe is a challenge and it appears to be a challenge in this case also. it all goes down to gathering that information and assessing it properly to make sure everyone is safe while they do the search. >> local media reports say the firefighters, some had to take what's called the defensive position when they arrived. what does that mean? >> well, defensive position is a term used to refer to attack in the fire from an outside position. safe position. outside of the hot zone. the hot zone is the area of immediate danger. sometimes it's high capacity