As the #ISS reaches it's 15th anniversary (#ISS15), let's pause to reflect on the amazing accomplishments of living and working in space these last 15 years. Zarya, the first space station module, was launched aboard a Russian Proton rocket and placed into orbit on Nov. 20, 1998. Two years later the first crew would occupy the station which consisted of just three modules including Russia’s Zvezda service module and the United States’ Unity node. When Expedition 1 returned to Earth four months later the station had expanded to a fourth module, the U.S. Destiny laboratory, and its first solar array, the P6 truss structure, attached to Unity. Fast forward to today and you have the 38th crew to live and work continuously aboard the orbital laboratory. They are moving ahead with science to benefit life on Earth and in space. The six-member crew is also ensuring the station is operating in optimal shape and exercising to stay healthy during its long-term stay in space. The space station c...