Two US Navy destroyers involved in deadly collisions this year -- the USS John S. McCain and USS Fitzgerald -- had lengthy records of expired training certifications and some requirements had lapsed for more than two years, according to a new report obtained by CNN.
원문출처 : http://www.cnn.com/2017/12/12/politics/navy-gao-report-ships-training-expired/index.html
원문출처 : http://www.cnn.com/2017/12/12/politics/navy-gao-report-ships-training-expired/index.html