Do owners of reentering spacecraft notify the countries' whose airspace they are likely to violate and seek permission?
If Country A's rocket hits an incorrectly declared satellite of Country B, which institution can arbitrate the dispute? Under which international law?
Does NASA's Deep Space Network sometimes listen to other space agencies' spacecraft "just for the heck of it" or other non-mission related reasons?
What is the largest single project (in tonnage) in which an international space cooperative has launched and or constructed in space?
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