new york city but he could only get permission to build ships for transporting mail not people beach then began building his system in secret he even proved it could work but the city still decided against it. now the idea is being tested again in l.a. the tube is too short for the parts to reach high speed but it's long enough to test technical feasibility the teams is supposed to demonstrate that the pods can withstand extreme conditions out of the twenty seven finalists change only three qualified for this round including the german tain will make it through. this in our secret weapon is the compressor and we are one of the few teams to use one that sucks the rest of the air out of the two that's a partial vacuum operating at one one hundredth of atmosphere at pressure that