National Zoo marks 40 years of pandas in DC

Associated Press
FILE - In this April 20, 1974 black-and-white file photo, The National Zoo's giant pandas, Ling-Ling and Hsing-Hsing  play in their yard in Washington.  The National Zoo is celebrating 40 years of pandas. Monday was the 40th anniversary of the day pandas Hsing-Hsing and Ling-Ling landed at Andrews Air Force Base in Maryland. The pandas were gifts to the United States from China following President Richard Nixon's historic visit to the country. The pandas were officially presented to the Zoo on April 20, 1972. Ling-Ling lived at the National Zoo until 1992, when she died. Hsing-Hsing died in 1999. (AP Photo/Charles Tasnadi, File)
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FILE - In this April 20, 1974 black-and-white file photo, The National Zoo's giant pandas, Ling-Ling and Hsing-Hsing play in their yard in Washington. The National Zoo is celebrating 40 years of pandas. Monday was the 40th anniversary of the day pandas Hsing-Hsing and Ling-Ling landed at Andrews Air Force Base in Maryland. The pandas were gifts to the United States from China following President Richard Nixon's historic visit to the country. The pandas were officially presented to the Zoo on April 20, 1972. Ling-Ling lived at the National Zoo until 1992, when she died. Hsing-Hsing died in 1999. (AP Photo/Charles Tasnadi, File)

WASHINGTON (AP) — The National Zoo is celebrating 40 years of giant pandas.

Monday was the 40th anniversary of the day that the pandas Hsing-Hsing and Ling-Ling landed at Andrews Air Force Base in Maryland. The pandas were gifts to the United States from China following President Richard Nixon's historic visit to that country.

The pandas were presented to the zoo officially on April 20, 1972. They were the first pandas in US zoos in modern history. Now 11 pandas are at four American zoos.

Ling-Ling lived at the National Zoo until 1992, when she died. Hsing-Hsing died in 1999.

The zoo's current two pandas, Tian Tian and Mei Xiang, arrived in December 2000.