of NASA's first tasks was to develop a reliable rocket to launch
small satellites and probes into space. The result was Scout,
the smallest launch vehicle in NASA's inventory.
NASA wanted the new rocket to be operational as quickly as possible,
it used components from existing solid-propellant rockets to
build the Scout. The first stage was adapted from the Navy's
Polaris missile, the second stage from the Army's Sergeant missile,
and the upper two stages from the Navy's Vanguard.
1960 NASA has carried out more than 100 Scout launches, most
of them placing satellites in Earth orbit for scientists, the
Department of Defense, and customers from other nations. The
last Scout was launched in 1994.