Three men were handed down prison sentences this week for participating in a scheme to defraud the government of more than $20 million through Army Corps of Engineers contracts, the Justice Department announced Thursday. Harold Babb, the former director of contracts at Eyak Technology LLC, was sentenced to seven years and three months in prison on federal charges of bribery and unlawful kickbacks, according to a news release. Babb admitted that he paid Army Corps of Engineers program manager Kerry Khan in return for Khan’s approval on contracts and subcontracts to EyakTek and Big Surf Construction Management, an EyakTek subcontractor,…