Williams syndrome: A genetic disorder characterized by mild mental retardation, unique personality characteristics, unusual facial features, and cardiovascular disease. The level of calcium tends to be high in blood (hypercalcemia) and urine (hypercalciuria).
Long March: Long March, (1934â35), the 6,000-mile (10,000-km) historic trek of the Chinese communists, which resulted in the relocation of the communist revolutionary base from southeastern to northwestern China and in the emergence of Mao Zedong as the undisputed party leader. Fighting Nationalist forces
The Tiananmen Square protests in pictures, 1989 A Chinese man stands alone to block a line of tanks heading east on Beijingâs Cangan Boulevard in Tiananmen Square, on on June 5, 1989. The man, calling for an end to violence and bloodshed against pro-democracy demonstrators, was pulled away by bystanders, and the tanks continued on their way.