engineering capabilities. it doesn't take much of a weak link to cause what you saw just there. incredible dynamic forces a lot of speed, and a lot of pressure on the structure itself. and there will be plenty of information on the ground right now indicating what the possible failures might be. a rocket has a huge amount of telemetry, data coming down to the ground as it rises to orbit. and so i'm sure they'll be able to figure this out pretty quickly but it's a big setback for the international space station program for sure. >> perhaps for spacex as well. talking to cnn's rachel crane over email. she has been studying and covering the spacex missions for a long time as have you, miles. she pointed out to me. spacex has a perfect record on these cargo missions until today. >> this is their seventh official supply mission.