new, lose the associate head of civil engineering at purdue university and joins us live from west lafayette, in indiana. i am good to have you with us. so look, i mean, some of the videos we've seen quite extraordinary, seemingly modern apartment buildings in turkey, just collapsing into their foundations. how does that happen so easily? i mean, it's clear that many of these buildings just weren't strong enough in the 1st place . oh, well, 1st of all of the ground motions, we have seen aria and the upper end of the spectrum we have seen before. so these are this of their strong shaping and multiple earthquakes as far as they are, the buildings go. yes. some of this, all the buildings particularly they are concerning their collapses based on what we see that the type of collapse on this needs to be verified in the field. but we think that there are certain that the drift levels, the distortion levels are excessive, but some of failure most of these so called pancake failure modes indicate that there might be some detailing issue. they may be some great or structured items. yeah, we, we under