He said they had voiced worries about dangerous space debris and escalating military rivalry in space, but said such fears were groundless.

他说这些国家担心太空碎片会有危险以及太空军事竞争升级，但是他说这些担心毫无根据。

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Space travel can be so delightful but at the same time invisibly dangerous.

太空旅行是如此令人愉快，但同时又存在无形的危险。

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Military commander Major General Igor Makushev said the military will develop a series of measures aimed at protecting Russia from falling meteorites and other dangerous space objects.

FORBES: Russia Military To Shoot Down Meteors

"To call for 1970s-style government mandates is frankly dangerous in the wireless space, " says Joseph Farren, director of public affairs for CTIA-The Wireless Association.

FORBES: Spectrum Warriors

Space flight is dangerous, just as exploration has been dangerous since the earliest days when humans sought to learn what existed beyond the horizon.

NPR: Former Astronaut on NASA Risk Assessment