One of the central issues in the debate over retiring the A-10 has been whether or not the F-35 Joint Strike Fighter will be an adequate replacement to perform the close air support mission. The program office has issued a number of conflicting statements on the issue. And in this week’s Senate Armed Services Committee update on the F-35 program, the most heated exchange came when Senator Kelly Ayotte (R-NH) sought clarification about conflicting statements made by Air Force leaders regarding the mission and which aircraft would perform it.

Senator Ayotte first mentioned Air Force Chief of Staff General Mark Welsh’s recent statement in which he said, “the mission capability of the A-10 will not be replaced by the F-35.”

She then referenced the F-35 Program Office’s own webpage, which clearly states the plane is to replace the A-10.

“Is General Welsh right or is your website right?” she asked F-35 program manager Lt. Gen. Christopher Bogdan.

General Bogdan completely dodged the question as being above his paygrade. Frank Kendall, Under Secretary of Defense for Acquisitions, said both statements were correct. “We will replace A-10s with F-35s,” he said. But while the F-35 would perform the mission, it would simply do it very differently than the A-10.

Senator Ayotte stressed the need for comparative flight testing, something the Project On Government Oversight has also argued is essential before retiring any additional A-10s in order to ensure the lives of troops on the ground will be adequately protected. The House Armed Services Committee’s Chairman’s mark of the National Defense Authorization Act for FY 2017 includes a provision to this end (Section 134) that we hope to see mirrored in the Senate.

Dr. Michael Gilmore, Director of Operational Test & Evaluation, then produced the F-35’s operational requirements document, which clearly states the F-35 is supposed to replace the A-10.

Senator Ayotte then inquired about the upcoming comparative tests pitting the F-35 against the A-10 to find out if indeed the new plane can perform this critical mission.

“Comparison testing just makes common sense,” Dr. Gilmore told the Senator. “If you’re spending a lot of money to get improved capability…the easiest way to demonstrate it is to do a rigorous comparison test.”

You can watch the entire exchange below:

This piece first appeared on the POGO website here.