After a $1 billion investment that produced “negligible” value, the Air Force is formally scrapping a next-generation logistics management system, officials announced Thursday.The Expeditionary Combat Support System (ECSS) program is “no longer a viable option” for meeting a fiscal 2017 deadline for having auditable books, Air Force spokesman Ed Gulick said in a statement. “Therefore, we are canceling the program and moving forward with other options.” The cancellation will cost up to 115 contract employees their jobs and require the “realignment” of 55 military personnel and government civilian employees, he said.The ECSS program, underway since