In 1986, one of NASA's space shuttles, the "Challenger," exploded shortly after takeoff, killing its crew. The tragedy delayed space-shuttle launchings for three years.
Challenger is an ABC TV-movie based on the events surrounding the Space Shuttle Challenger disaster. Its production was somewhat controversial as the families of the astronauts generally objected to it. The film concentrates on the safety inspections and arguments surrounding the o-rings that ultimately were blamed for the break up of Challenger.
Modified Caterpillar agricultural tractors used for ferrying heavy equipment on the High Antarctic Plateau. Between 360 and 600 horse powers depending on the version. Right: Caterpillar Challenger Traverse Special before Concordia.
An individual who challenges an incumbent during en election for a particular political office. | The challenger had served as a county commissioner. [ Lesson 5