WASHINGTON -- In 1961, Sam Jordan had just finished a six-year stint flying helicopters in the Marine Corps when he saw a want ad for an upstart airline called Air America.

"They said they wanted pilots," he recalled. "They didn't say anything about where the flying would be."

Within months, Mr. Jordan was flying helicopters in Laos, carrying medical equipment and other supplies to refugees in remote mountain villages. In subsequent years, he flew airplanes along the Ho Chi Minh Trail, scanning for radio signals from the ground and dropping provisions from the sky. He and other pilots developed code words for their cargo: "Soft rice" meant food; "hard rice" meant arms.

In 14 years working for Air America, Mr. Jordan never formally was told who was footing the bill for his often-harrowing flights. But he and the other Air America pilots knew. They called their mystery client "the customer," Mr. Jordan said.

"And the CIA was always the customer."

Few Americans know it, but Air America is embedded in some of the most iconic images of the Vietnam War. In the famous photo of the evacuation of the U.S. Embassy in Saigon, the helicopters lifting stranded diplomats off the rooftop belonged not to the military but to Air America.

The company was shut down after the fall of Saigon in 1975, and the U.S. government subsequently acknowledged that Air America was a wholly owned subsidiary of the CIA. But more than 30 years later, the government still is grappling with Air America's former employees. They worked for Air America, but does that mean they worked for the CIA?

Mr. Jordan and hundreds of other Air America pilots, mechanics, executives and workers have spent the last two decades battling for recognition as CIA employees -- or at least federal employees -- a designation that would entitle them to pensions and other benefits.

The CIA has fought the effort, arguing that Air America employees were hired to take part in important missions but never officially were brought into the agency.

The distinction is important to the agency, where "contractors" now outnumber the official work force. Officials fear that granting CIA status to Air America retirees would open the gates to thousands of similar claims.

Until recently, the Air America effort seemed futile. A lawsuit filed in the 1980s was tossed out, and efforts to enlist help from Congress never got off the ground. But recent developments in Washington have given Air America workers new hope.

When Democrats won control of Congress in the fall, Sen. Harry Reid, D-Nev., became Senate majority leader. Mr. Reid's state is home to Air America retirees, and he is using his position to push legislation that would require the nation's top spy officials to take another look at the Air America case.

It's hard to imagine that CIA contractors would get such consideration. But Air America occupies a legendary position in U.S. espionage.

For nearly three decades, Air America and its CIA sibling, Civil Air Transport, served as the circulatory system for clandestine U.S. operations in Southeast Asia. They moved supplies, weapons and spies across the treacherous terrain of Cambodia, Vietnam, Thailand and Laos.

The CIA's air fleet was as large as a major commercial airline at the time. At their peak in the mid-1960s, the CIA "proprietaries" employed more than 15,000 people -- many of them foreign nationals -- and operated about 200 planes.

Pilots often had to fly without navigation systems; they had to elude enemy fire and land on tiny airstrips cut into mountains. As part of its cover, the CIA operated a successful commercial airline, offering regular passenger service to Bangkok, Tokyo and other destinations.

For 10 years, Air America supplied a secret army in Laos that pinned down thousands of communist guerrillas who would have joined the fighting in Vietnam. By the time Air America was dismantled, more than 230 of its pilots and crew members had been killed.

A plaque honoring Air America hangs at CIA headquarters. During the dedication ceremony, Jim Glerum, a top CIA officer in Laos in the 1970s, gave a speech which went to the heart of the debate.

Air America crews "were not CIA employees in the technical-legal sense of that word," Mr. Glerum said. "Yet we routinely asked them to undertake missions that we could not conduct ourselves, and to accept hardship and hazards we have only rarely asked our own people to face."

Air America traces its origin to 1946, when U.S. Army Gen. Claire Chennault signed a contract with the Chinese government to create a new airline. When the communist revolution forced the nationalist government to flee to Taiwan, Chennault's airline became a key supply link to loyalist villages on mainland China. It was the start of a clandestine anti-communist campaign spearheaded by the CIA that would carry on for the next quarter-century.

About 500 former Air America and Civil Air Transport employees live in the United States, ranging in age from the 50s into the 90s. They keep in touch through a Web site, a newsletter and reunions, including one in Dallas in October that drew about 40 former pilots and crew members.

For many of them, the effort to win CIA status is not a consuming cause. After 20 years of trying, few expect to see any reward. Most acknowledge the tenuous nature of their claim. They never had any official connection to the agency -- never signed an employment contract, never were sworn in at agency headquarters, never even got a government paycheck.

Nevertheless, those leading the effort point to government regulations dating to the 1930s that supports their contention that working for a government-owned corporation makes one a federal employee. They also consider it an issue of fairness, arguing that they deserve consideration from Congress because of what they did for their country.

Mr. Jordan, 75, figures he would collect about $1,000 a month.

"I don't think it would be very much," he said. "I'm not going to jump off a cliff if I don't get it."

Roy Watts, 83, who was one of the first Air America pilots, said he would be entitled to as much as half a million dollars in back retirement and disability pay.

In 1954, Mr. Watts took part in a storied moment in Air America history, when he and two dozen other pilots made hundreds of desperate deliveries to French forces pinned down by North Vietnamese troops in Dien Bien Phu. Despite 682 airdrops of artillery and other supplies, the communists crushed the French in a battle that marked the end of France's colonial rule.

Mr. Watts and six other surviving pilots were awarded the French Legion of Honor.

In a 1987 ruling, a federal appeals court said Mr. Watts hadn't met several basic requirements of being a federal employee: He had never signed a contract with the government, was never given an oath of office, and therefore was never "appointed" to the civil service.

The CIA has relied on such rulings to persuade lawmakers to drop Air America legislation. But it has been an awkward fight for the agency, which doesn't want to be seen as callous.

CIA spokesman Paul Gimigliano said the agency honored the pilots and crew members. "The courts, however, have ruled that they were not federal employees and thus are not eligible for federal retirement benefits," he said.

CIA officials also emphasize that Air America did not shortchange employees on the pay and benefits they were promised.

During Air America's heyday, pilots typically got $1,200 or more each month, tax free. The company did offer retirement accounts. Most employees contributed a percentage of their paychecks and cashed out when they quit.

By the early 1970s, the CIA's secret air empire wasn't so secret anymore. Amid growing scrutiny from Congress and the media, CIA Director Richard Helms decided to shut down Air America.

As Saigon fell, Mr. Jordan and other pilots ferried planes out of Vietnam. The aircraft, airfields and other property subsequently were sold, leaving $25 million for the CIA to return to the U.S. Treasury. The pilots and other crew members were summoned to the company's offices in Hong Kong.

"They gave us what we had coming and an airline ticket and that was it," said Mr. Jordan. "That was the end."