t took only five months for the feds to reveal that a Saudi airman who killed three men at a Pensacola, Fla., naval base had communicated with Al Qaeda before the shooting.

It took nearly two decades — and a stunning mistake by the FBI — to reveal the name of a Saudi official suspected of helping the 9/11 hijackers.

Attorney General William Barr’s personal handling of the two cases, which both carry major implications for U.S. relations with Saudi Arabia, have outraged some families of 9/11 victims fighting in court to learn more about Riyadh’s suspected role in the 2001 attacks.

“There’s a stark contrast with what they’re doing with the Saudi airman and the giant, massive coverup they’ve been doing of linkages between Saudi Arabia and 9/11,” said Brett Eagleson, whose father was killed in the attacks.

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James Kreindler, an attorney representing the 9/11 families, said the case against Saudi Arabia had uncovered links to the upper levels of the Saudi government. Al-Jarrah, he said, was the “right-hand man” of Prince Bandar bin Sultan al-Saud, the Saudi ambassador to the U.S. from 1983 to 2005.

The case also was uncovering details about the U.S. intelligence failures leading up to the terrorist attack, he said. The Saudi government denies any connection to the hijackers.