News: Nation Pentagon grounds entire fleet of F-35 fighter jets after finding crack in engine blade February 22, 2013 | Modified: February 22, 2013 at 5:31 pm Leave a comment WASHINGTON (AP) — Pentagon grounds entire fleet of F-35 fighter jets after finding crack in engine blade. Sign Up for the Daily E-dition newsletter! Please enter your email address below to begin receiving the Daily E-dition newsletter. You must enter a valid email address in the field above! Thank you for signing up for the Daily E-dition newsletter! You should receive your first newsletter very soon. We're sorry, there was an error processing your newsletter signup. Please click here to visit our Newsletter Signup Center to register for this newsletter.