At 12:47 p.m. EDT, hatches were opened between the International Space Station and space shuttle Atlantis, beginning the joint phase of the STS-135 mission.
NASA Television will air a Mission Status Briefing with STS-135 Lead Shuttle Flight Director Kwatsi Alibaruho at 1:30 p.m., or immediately following the standard welcome ceremony between the crews.
At 4 p.m., chairman of the Mission Management Team and Deputy Manager of the Space Shuttle Program LeRoy Cain will hold a news conference on NASA TV.