![The WIRE telescope inside the cryostat assembly.](https://appel.nasa.gov/wp-content/uploads/2012/01/may983-670x380.jpg)
In 1999, the Wide-field Infrared Explorer (WIRE) lost its primary mission thirty-six hours after launch. Those who worked on WIRE, which was the fifth of the Explorer Program’s Small Explorer-class missions, thought they had done what they needed to achieve success.