Between 2011 and 2017, more than a dozen U.S. Air Force F-35 pilots reported experiencing oxygen deprivation symptoms. NASA has discovered new information that may help solve the mystery behind these physiological episodes and wants to study the issue more deeply. But the F-35 Joint Program Office is disputing the findings.

F-35 Program Executive Officer Lt. Gen. Eric Fick has confirmed that the stealthy fighter’s Autonomic Logistics Information System (ALIS) replacement will not be delivered in 2022 and he anticipates having an updated program schedule in the next six to nine months.

A U.S. Air Force general has confirmed that problems with GDC Technics—a cabin interiors designer for VIP aircraft and a subcontractor on the VC-25B—will delay the delivery of the new Air Force One.