A rocket fired for test purposes.
1January 25, 1995 Russian radar interprets a NASA research rocket as a US submarine-based missile.
2Most of the rockets have been much smaller, including countless research rockets designed to gather atmospheric information.
3Masten Space Systems has lost one of its research rockets after a mostly successful test flight this week.
4Until now scientists have had to be content with the relatively meagre date obtained by instrument-carrying research rockets.