I came across this picture from a 1958 Popular Mechanics. Listed among the rocket configurations was the Farside Rocket. It seem to have a strange box around it and I was totally unfamiliar of its purpose. A little research and I found the following…
In 1957 an attempt to send a rocket to an altitude of 4000 miles. The rocket was the Farside rocket and was launched from an high altitude balloon. Farside is sometimes referred to as a Rockoon (Rocket-Balloon) vehicle.All of the Farside rockets were 4 stage rockets using existing solid fuel technology. There were 6 launch attempts all failed except the 5th and 6th launches which approached the 4000 mile goal.
Video of a Farside launch
Further reading on the Farside Program