In addition, groups at the University of Pisa in Italy and the Jet Propulsion Laboratory in Pasadena, Calif., began doing routine risk evaluations of potentially menacing objects.

• 除此之外，义大利比萨大学和美国加州帕沙第纳喷射推进实验室的研究团队，也开始定期对可能造成威胁的物体进行评估。