Fighter plans and attack planes are known as tactical aircraft. The armed services have a lot of them, mostly old. So old, most of them are past their services lives. Yet they are still in the inventory and the Defense Department wants to spend a hundred billion dollars to refresh the fleet. The Government Accountability Office finds, DoD needs more detailed analysis before proceeding. To explore the details, Federal Drive host Tom Temin spoke with Marie Mak, GAO’s Director of Contracting and National Security Acquisitions Issues.