john black stone spoke to some experts on cbs sunday morning. j from sky scapers in manhattan to sleep campuses in silicon valley, officers across the country have been mostly empty for months. >> this virus is a workplace virus, this is an office virus, this is one of the few things ay in thld down. >> the nd rents office space to major corporations internationally. you're going to be making a lot of changes now. >> that is an understatement, john. did world is different and we're not going back to the old way. >> for some that may mean not going back to the office period. tech giants, twiser and square have told their employees they can work from home indefinitely. other major companies plan to keep offices closed at least until the end of summer, some until the end of the year. that's not good for those in the real estate business. >> that certainly a thought that goes through my mind these last few months, what if kevin work from home forever. before this on an average day at an average company, only about 80% were in the office. maybe it wi