The Clearfield-based company says last week's 247 layoffs also were due to the end of a Minuteman ballistic missile program.
Since April, ATK has laid off about 1,500 engineers, technicians, factory workers and others in Utah, leaving about 3,000 workers.
The company gave the workers a week's pay for every year of service, up to a maximum of 26 weeks of pay. The federal government is subsidizing the cost of their health insurance for 15 months. The Deseret News
