four santry, blast standards. the architect of design and said yes. id will. >> when was that? >> late november early december 2013. we learned things from blast test and i also am from the school show me. but when i have the architect of record and the best blast engineering company in the world to tell me this will protect our people absolutely, that is a promise they put into writing so i can write a cert that the facility will protect our people adequately. we wanted to do with any way we scheduled those shortly after that and we learn things. in the late up we used last fender, the same or thicker. we learn things. ultimately when we blast tested a full layup it confirmed exactly what the engineers had said. >> that is not true for you had failures. you're telling me there are no failures? were there? >> pieces of glass that we tested those that were less than what we put up failed. >> period ago. >> less than what we we're doing. we do blast testing to learn about a lot of things. the full-scale mockup of the building passed every single test with flying colors. >> after