[inaudible conversations] the committee on space will come to order and without objection the chair is authorized tour declare a recess at any time. Welcome to todays hearing entitle the International Space station addressing operational challenges you have the written testimony biographies and truth and testimony disclosure for todays with this is part or recognize myself for five minutes for an opening statement. Good morning welcome to our hearing today and i want to thank our witnesses for taking time to appear before the committee. Since 2013 the program has experienced a number of challenges we have thank committed to identifying challenges to address them and reach our goal and Justin Lehigh commitment. At the iss have had water leaks third three times with one during a spacewalk. April 26 an unmanned russian vehicle damage stave reflector while docking with the. Host team per could generate 14, a false alarm of the ammonia leak caused the crew to retreat into the russian segmen