pack 30 hours into an 18-hour work day." Some of the early tasks took longer than scheduled. For example, the activation of a food warmer in Zvezda's galley was scheduled for 30 minutes, but it took the astronauts a day and a half to turn it on. STS-97 Endeavour docked with the ISS on 2 December 2000, on mission STS-97, bringing four more Americans and a Canadian temporarily to the station. The shuttle also brought the first pair of U.S. provided photovoltaic arrays, which would provide crucial electricity for further development of the station. In total, STS-97 brought 17 tons of equipment to the ISS, which also included expandable metal girders, batteries, electronics and cooling equipment. Three spacewalks were conducted by the crew of STS-97, all of which were completed prior to opening the hatch between shuttle and station. On 8 December, the hatch between the two was opened and the two crews greeted each other for the first time. It had remained closed to maintain their respective atmospheric pressures. The Expedition 1 crew took this opportunity to leave the station and tour the inside of the space shuttle, which was thought to be good for their psychological well-being. Progress M1-4 Prior to Endeavour docking, the Russian resupply spacecraft Progress M1-4, which came to the station in mid-November, was undocked to make room for the space shuttle. This Progress spacecraft remained undocked for the duration of STS-97, parked in orbit about a mile away from the station. It docked manually again with the station on 26 December by Gidzenko, after Endeavour left. The automatic docking system for this Progress spacecraft had failed on the first docking in November. The crew spent much of the following week unloading the Progress spacecraft. Christmas and New Year On Christmas Day, the Expedition 1 crew were given the day off work. They opened presents delivered by Endeavour and the Progress supply ship. They also each took turns speaking to their families. In the following days they did several video downlinks, some with Russian TV stations. The crew had a quiet New Year. Citing a Naval tradition, for the New Year's entry of the station's log, Shepherd provided a poem on behalf of the crew. STS-98 On 9 February 2001, Space Shuttle Atlantis docked to the ISS, bringing the five American crew members of STS-98 temporarily to the station. The mission was originally planned for