The Navy has once more postponed a key milestone for its new CH-53K heavy-lift helicopter, according to a service spokesman. The service does not have a specific date for the first-flight milestone, but anticipates the event before the end of 2015, according to a Navy statement sent to Inside the Navy July 15. This news marks the second delay in CH-53K first flight in the past year. The milestone was planned to take place in late 2014, but last...