Original sentence: <ref name ="co history">.Friede Goldman International bought Halter Marine Group in 1999.Harold Halter and Jimmy Dubuisson started the original company known as Halter Marine in 1956 in New Orleans; their first built vessel was a 26-foot pleasure boat.In September 1996, Trinity spun off several bluewater shipyard assets as a separate company using the name Halter Marine Group, Inc.The company was fined $1.32 million by the United States Department of Labor for 17 willful and 11 serious violations, including willfully exposing workers to toxic fumes in a confined space.The company was sold again to Singapore Technologies Engineering in 2003, where it began operating under the name VT Halter Marine Inc.The original company would grow to employ more than 4,000 people at its height, but the decline of the offshore oil industry led Halter to sell the company to Trinity Industries in 1983, where it became part of Trinity Marine Group.While working on an $87 million contract with the United States Navy to build a 350-foot ship in 2009, unsafe working conditions led to an explosion that killed that two employees and injured five others
Edited sentence: After it was awarded an $87 million contract by the United States Navy to build a 350-foot ship in 2009, VT Halter sent workers into conditions that it knew to be unsafe.An explosion killed two and injured five others.It was fined $1.32 million by the United States Department of Labor for 17 willful and 11 serious violations, including willfully exposing workers to toxic fumes in a confined space