The heads of NASA and the European Space Agency (ESA) have issued statements condemning the latest example of a Chinese Long March 5B rocket booster falling to Earth in an uncontrolled reentry. The 23-ton (21 metric tons) piece of debris resulted from China's launch of a Long March 5B rocket on Monday (Oct. 31) that carried the Mengtian science module to the nation's Tiangong space station. As with other Long March 5B launches, there was no attempt made to safely deorbit the rocket's core stage after it reached orbit. The massive piece of space junk was left to be pulled…