Updated

Five years ago the Air Force considered a series of proposals to boost morale and fix other problems in its nuclear missile corps, according to internal emails obtained by The Associated Press. But many fell short or died on the vine.

Now, with the force again in crisis, the Air Force is retracing those earlier steps.

The new effort is more far-reaching, on a tighter timetable and backed by Defense Secretary Chuck Hagel.

As a result, this new approach appears to hold more promise for an Air Force under scrutiny after a series of embarrassing nuclear setbacks and missteps.

The earlier effort was launched in 2008-09 and included some of the ideas being floated today by a new set of Air Force leaders, including bonus pay and other incentives.