'Quiet Stability'.

The article focuses on the development of the F-35 fighter plane model by the nine-nation F-35 Joint Strike Fighter program. It says that a delay in production is due to the strike at aircraft manufacturer Lockheed Martin's Fort Worth. It states that the introduction of Block 2A software in low-rate-initial-production (LRIP) 4 aircraft is intended for flight training. It adds that program officials focuses in flight trials which is a requirement to reduce costs in flight testing and production.