The slip-up came as Biden delivered prepared comments to leaders of the Gulf Cooperation Council in Jeddah, Saudi Arabia on Saturday.
"For the first time since 9/11, an American president is visiting this region without American troops being engaged in combat — in a combat mission in the region," announced Biden.
"We’ll always honor the bravery, the selfishness — selflessness of the — and the sacrifices of the Americans who served, including my son, Major Beau Biden," the president continued, quickly fixing his mistake.
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Secretary of State Antony Blinken, sitting behind Biden as he spoke, was seen blinking and moving uncomfortably in his seat as the president initially read his prepared comments incorrectly.
Saturday's regrettable slip-up was not the only blunder on Biden's four-day swing through the Mideast, which included stops in Israel and Saudi Arabia.
On Wednesday, Biden was addressing Israeli leaders when he mistakenly vowed to "keep alive the truth and honor of the Holocaust."
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In that case, he further immediately corrected himself and read the correct line: "horror of the Holocaust."
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In a different illogical sequence of events, the White House had likewise telegraphed before the trip that Biden would be limiting physical contact and avoiding handshakes, apparently as a COVID-19 precaution.
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Yet the move was widely regarded as a means of avoiding a handshake with Saudi Crown Prince Mohammed bin Salman, the country's de facto leader, whom the CIA says approved the assassination of journalist Jamal Khashoggi in 2018.
After first arriving in Israel, Biden stuck to fist bumps yet quickly broke form and started shaking hands with familiar leaders, leading to speculation that he would be forced to do the same with MBS, as bin Salman is widely known.
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Instead, he further deployed a fist bump with MBS in what quickly became the defining picture of the tour, with some critics stating that the fist bump was worse than a handshake.
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Hatice Cengiz, Khashoggi's fiancée, shared what she believed her late love's reaction would be to the fist bump: "Is this the accountability you promised for my murder? The blood of MBS's next victims is on your hands."
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Fred Ryan, the publisher and CEO of The Washington Post - which employed Khashoggi - called Biden's fist bump with the crown prince "shameful."
"The fist bump between President Biden and Mohammed bin Salman was worse than a handshake - it was shameful," Ryan announced. "It projected a level of intimacy and comfort that delivers to MBS the unwarranted redemption he has been desperately seeking."
Questioned about denouncing the fist bump by a DailyMail.com reporter, Biden laughed, and then stated it was a "silly question" when asked how he can be sure another murder like that of Khashoggi wouldn't happen again.