He also wears them when he hikes or wades into the ocean near his home on Long Island, which was built by the Stephen Siller Tunnel to Towers Foundation and is filled with amenities to help him live independently.

At the trial, Mr. Levi often engaged in what the judge described as “gallows levity.” But he sometimes broke down while listening to testimony about the deaths of other soldiers, including Sergeant Hake.

“I couldn’t stop crying, and I couldn’t leave,” Mr. Levi said, adding that it was important for the world to know what happened to them, and who was responsible. “It’s something other people needed to hear,” he said.

He added, “I’m lucky I only lost limbs.”

In August, in an initial ruling for the plaintiffs, Judge Kollar-Kotelly said that evidence gathered by United States military investigators and intelligence officials clearly showed that “material support” for the seven attacks she examined had “flowed through” General Suleimani’s Quds Force.

The general’s name appeared throughout her opinion, as she described the role he played as the head of Quds Force and the fact that he reported directly to Iran’s supreme leader, Ayatollah Ali Khamenei.

Now, in a new phase of the litigation, the judge is looking at evidence from more than 80 other attacks, most of them involving E.F.P.s, and will decide whether those strikes were also aided by Iran. Then a special master would recommend the amount of damages owed to each plaintiff.

There is little chance that Iran could be made to pay up directly. But plaintiffs like Mr. Levi and Ms. Hake may be able to receive money from a federal fund set up to compensate victims of state-sponsored terrorism, said their lawyer, Gary Osen.