An astronaut expressed her determination as she and three other explorers blasted off in a SpaceX rocket for International Space Station (ISS) last night. Anne McClain is one of four astronauts deployed to replace Butch Wilmore, 62 and 59-year-old Suni Williams - stuck there since June - in a long-awaited mission. SpaceX sent Ms McClain, Nichole Ayers, Takuya Onishi and Kirill Peskov in its rocket on Friday night at NASA’s Kennedy Space Centre in Florida, US. Minutes into the flight, Ms McClain,