A French and an American astronaut are scheduled to float outside the International Space Station today for a spacewalk aimed at upgrading the orbiting outpost for the arrival of future space crews.<br/><br/>The spacewalk by France's Thomas Pesquet, 39, and American Shane Kimbrough, 49, will be the latest in a series of outings to install new docking ports for the next generation of commercial spacecraft. The new crew spaceships, currently under design by SpaceX and Boeing, should begin flying astronauts to the station in the coming years, as early as 2018. Currently, the only way the world's astronauts can reach orbit is by buying a ride aboard Russia's Soyuz capsules, at 81 million dollars per seat. <br/><br/>The goals for today's spacewalk include preparing for the installation of the second of two parking spots for space taxis, known as the International Docking Adapter.'Pesquet and Kimbrough also plan to install new computer<br/>equipment outside the space station, and will lubricate and inspect the space station's robotic arm, used to grab approaching spacecraft and move items outside the global laboratory.