Then a newlywed sailor, he recalled a Japanese plane flying low and slow in his direction as he rushed to his battleship from his home after hearing explosions and learning of the attack on the radio.
"When he got the right angle, he banked over, turned his machine guns lose," Downing, now 103, said in an interview at a Waikiki hotel, "But fortunately he didn't bank far enough so it went right over my head."
The next aviator might have better aim, Downing remembers thinking. And with nowhere to hide, "I was afraid," he said.
Those who gather at the ceremony on a pier overlooking the harbor are expected to observe a moment of silence at 7:55 am, the same moment Japanese planes began their assault.
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Thousands of other servicemen and women and members of the public are expected to attend and watch via a livestream feed. Downing said he comes back to Hawaii for the anniversary commemorations to be with his shipmates.
His ship, the USS West Virginia, was hit by nine torpedoes.
"We were sinking and everything above the water line was on fire," he said.
Downing said he felt proud while watching sailors balance the capsizing ship by allowing water to seep in. The tactic let the giant battleship slide into mud below.
"They just instinctively did the right thing at the right time without any thought about their own lives or safety," he said.
The West Virginia lost 106 men. Downing spent two hours fighting fires and checking the name tags of the dead so he could write their families personal notes about how they died.
Ray Chavez was out on a minesweeper, the USS Condor, in the early hours before the attack. He remembers noticing with his shipmates that a mysterious submarine was lurking off the harbor.
"At 3:45 am on December 7, I look out and spotted a submarine that wasn't supposed to be in that area," the 104-year-old Chavez said.
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