3 ms·
why?
by kingkawn 14y ago
why?
- TeMPOraL 14y agoBecause we have new materials, new technologies, and 40 years of experience with space plane design and operations, that's why.
- kingkawn 14y agoThe U-2 spy plane is in service after the retirement of its original replacement.
- InclinedPlane 14y agoThe B-52 is still a heavily used part of the US heavy bomber fleet and current plans are to keep it in service until 2040 and perhaps beyond (which is longer than the B-1b is planned to be in service).