en.wikipedia.org/wiki/KGB

In February 1973, Yuri Andropov was the KGB chief, not the leader of the Soviet Union or of the Politburo. Britannica’s CPSU overview says Leonid Brezhnev succeeded Khrushchev and was general secretary until his death in 1982, while Britannica’s Andropov biography says Andropov was head of the KGB from 1967 to 1982 and became the country’s leader only from November 1982. A CIA historical document also notes that Andropov was made a candidate member of the Politburo when he took over the KGB and that full membership was his in 1973, which further undercuts the idea that he was already leading the Politburo on 2 February 1973.

This sentence conflates two related but distinct espionage networks. The FBI’s history of the Rosenberg case says Harry Gold acted as courier for Klaus Fuchs, but that the Rosenberg spy ring was a network independent of the one Gold was involved in. The U.S. Department of Energy’s Manhattan Project history likewise explains that Fuchs and Theodore Hall separately penetrated Los Alamos, while Julius and Ethel Rosenberg never worked for the Manhattan Project and operated their own ring through David Greenglass. So Fuchs was an important Soviet spy, but calling him "the main agent of the Rosenberg spy ring" is inaccurate.

Standard reference works and contemporary reporting date President Ziaur Rahman’s assassination to 30 May 1981. Britannica gives his death date as May 30, 1981, Chittagong, Bangladesh, and a contemporaneous Washington Post report from May 30, 1981 says he was assassinated that day in a coup attempt. That contradicts the article’s statement that he was assassinated on 29 May 1981.