https://spaceref.com/status-report/nasa-iss-on-orbit-status-31-may-2011/
NASA ISS On-Orbit Status 31 May 2011 - SpaceRef
May 31, 2011 - Space news and reference site.
31 may 2011on orbitnasaissstatus
https://spaceref.com/status-report/nasa-sts-134-report-31-5-am-cdt-tuesday-may-31-2011/
NASA STS-134 Report #31 5 a.m. CDT Tuesday, May 31, 2011 - SpaceRef
May 31, 2011 - Space news and reference site.
5 a m