The BBC’s Orla Guerin has been taken on a tour of Al Sahel Hospital in Beirut where Israel claims millions of dollars in cash and gold are kept in a hidden Hezbollah bunker underneath.Doctors denied the allegation and took the BBC through the building, including to the first and second level below ground. They insisted there is nothing underneath.On Monday night the hospital had to evacuate around 50 staff and 15 patients – none of them critical – when Israel made its claim.