Instead , the Skybolt was cancelled within a few years .
The Hound Dog continued to be deployed for a total of 15 years until its replacement by newer missiles , including the AGM - 69 SRAM and then the AGM - 86 ALCM .
Instead , the Skybolt was cancelled within a few years and the Hound Dog continued to be deployed for a total of 15 years until its replacement by newer missiles , including the AGM - 69 SRAM and then the AGM - 86 ALCM .