Pressurized Mating Adapter 3 was grappled by the shuttle's robotic arm and installed on the Unity Connecting Module nadir port. The primary and secondary cable bundles were connected between the Pressurized Mating Adapter 3 and the Unity Module. Also, latches were opened on the Z1 Truss

A grapple fixture on the Z1 Truss was removed. The Z1 utility tray was deployed and its umbilical launch restraints released. The Z1 Manual Berthing Mechanism latches was cycled and opened. Wisoff and Lopez-Alegria performed one safety protocol test -- a flight evaluation of SAFER, which means "simplified aid for EVA rescue".

Hooking up connections between the P1 and S0 trusses and do other work and installations

Installation of the fluid jumpers where the S0 and the P1 are attached to each other, removal of the P1's starboard keel pin and relocation of the CETA cart from the P1 to the S1 Truss, which will allow the Mobile Transporter to move along the P1 to assist in upcoming assembly mission.

Installation of more SPD's (Spool Positioning Devices), reconfiguration of electrical har-nesses that route power through the Main Bus Switching Units and attaching Ammonia Tank Assembly lines.

Retrieving equipment and photograph the station's Russian Zvezda Service Module's docking port, Tyurin also hit a golf ball from a specially designed tee mounted on the Pirs airlock as part of a Russian commercial activity

Completing the activation of the lab complex's permanent ammonia cooling system. They made several of electrical and fluid line connections to tie the heat exchangers into coolant loop A; Most of the work was carried out in the so-called "rat's nest," a confined area between the Destiny laboratory module, the Unity connecting module and the Z1 truss that extends upward and supports the P6 solar array that provided the station's interim power.

Reconfiguring the second of two cooling loops for the Destiny module, securing the aft radiator of the P6 truss after retraction and preparing the obsolete Early Ammonia Servicer for removal this summer; several of the tasks were similar to those of the previous spacewalk

Removing shrouds, which provide thermal shading and which are larger than king-size bed sheets; they also made groundwork for attachment of a cargo carrier and preparing work for the relocation of the P6 Truss

Successful attempt to free a stuck antenna on the ISS Progress 23 cargo craft docked at the aft end of the station. They also surveyed docking navigation systems for the European Automated Transfer Vehicle, a cargo craft planned to make its maiden voyage in summer 2007