Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: The F-35 combat jet, due to be used on the UK's new aircraft carriers, will not make its UK debut on the opening day of the Farnborough Airshow.

Farnborough Airshow: F-35 combat jet fails to take to skies