In 2019, DOD will decide whether to enter full-rate production for the F-35 aircraft. From the next year onwards, the Pentagon plans to invest about $10 billion annually for two decades acquiring F-35s – the most expensive and ambitious weapon acquisition program in U.S. military history. By the time the program moves into full-rate production, 500 aircraft will be procured and will need fixes and resolving deficiencies found during the testing. Bringing those aircraft to full capability could cost $1.4 billion. The F35 program office will hold a summit later this year to determine who will be responsible for the costs associated with resolving the remaining deficiencies.