The wife of an FDNY chief who was killed on 9/11 slammed President Biden for his “do 9/11” comment yesterday — and called out the government over the “outrageous” plea deal offered to terrorists involved in the attacks.

Joanne Barbara spoke at the ceremony to honor her late husband, Gerard A. Barbara.

“The elected officials here today show their respect and reverence to the families on Sept. 11, or — in our president’s words — ’do 9/11,’ quite a flippant remark,” Barbara said, referring to Biden’s comment to a reporter earlier this week regarding his upcoming schedule.