Ed Long

Pilot

Ed Long, 83, who held the record for the most hours as a pilot in the history of aviation, a total of more than seven years in the air, died July 18 in Montgomery, Ala. The cause of death was not reported.

Mr. Long, who began flying at 17 after a single lesson, broke the world's record for flying hours, with 53,290 hours, in 1989. At the time of his death, he had more than 65,000 hours of flying time. His job involved checking power lines, many of which he checked while flying at less than 200 feet in a Piper Cub.

Viktor Liberman

Violinist

Viktor Liberman, 68, a Russian-born violinist who gained fame in the former Soviet Union before moving to the Netherlands, died of liver cancer July 17 at a hospital in Amsterdam.

He played for the orchestra of his native Leningrad for 29 years before immigrating to the Netherlands in 1979. He then joined the Rotterdam Philharmonic Orchestra as concert master, remaining with the orchestra until 1985, when he became concert master with the prestigious Royal Concertgebouw Orchestra. He led the orchestra until his partial retirement in 1997.

After officially retiring, Mr. Liberman often returned to the Royal Concertgebouw as a guest conductor. He also conducted orchestras in other cities across Europe.

Robert D. Thorne

DOE Official

Robert D. Thorne, 70, who was assistant secretary for energy technology at the Energy Department during the Carter administration, died of cancer July 20 at his home in Walnut Creek, Calif.

Mr. Thorne, a chemical engineer, worked for the Atomic Energy Commission in Colorado and South Carolina before moving to the Washington area in 1967. After he retired in 1979, he taught management at universities in San Francisco and was an energy research consultant.