Question 29 - Paragraph Comprehension Practice Test for the ASVAB

According to the passage, when did the first idea for developing GPS surface?

Like so many other high-tech developments, GPS was designed by the U.S. military. The concept started in the late 60s, but the first satellite was not launched until February 1978. In 1989, the Magellan Corp. introduced the first hand-held GPS receiver. In 1992, GPS was used in Operation Desert Storm. On March 1996, the President decided to make GPS free for civilian users.