Alan Turing Pardoned
First time accepted submitter a.ferrier writes "Today's computing would be unthinkable without the contributions of the British mathematician Alan Turing, who laid down the foundations of computer science, broke Nazi codes that helped win World War II at the famous Bletchley Park, created a secure speech encryption system, made major contributions to logic and philosophy, and even invented the concept of Artificial Intelligence. But he was also an eccentric and troubled man who was persecuted (and prosecuted) for being gay, a tragedy that contributed to his suicide just short of the age of 42 when he died of cyanide poisoning, possibly from a half-eaten apple found by his side. He is hailed today as one of the great originators of our computing age. Today he received a royal pardon."
The decoding operation at Bletchley Park became the basis for the new decoding and intelligence work at GCHQ. With the cold war this became an important operation and Turing continued to work for GCHQ, although his Manchester colleagues were totally unaware of this. After his conviction, his security clearance was withdrawn. Worse than that, security officers were now extremely worried that someone with complete knowledge of the work going on at GCHQ was now labelled a security risk. He had many foreign colleagues, as any academic would, but the police began to investigate his foreign visitors. A holiday which Turing took in Greece in 1953 caused consternation among the security officers.
Turing died of potassium cyanide poisoning while conducting electrolysis experiments. The cyanide was found on a half eaten apple beside him. An inquest concluded that it was self-administered but his mother always maintained that it was an accident.
http://www-history.mcs.st-and.ac.uk/Biographies/Turing.html
http://www.turing.org.uk/bio/part1.html