Alexander Butterfield oversaw the installation and operation of a voice-activated recording system in the Nixon White House ...

Alexander Butterfield, who has died aged 99, was the former White House aide who dropped a bombshell in July 1973 when he told a Senate committee investigating the circumstances surrounding the 1972 ...

Alexander Butterfield, the former White House aide whose testimony revealed the existence of President Richard Nixon’s secret ...

Alexander Butterfield, a former top aide to President Richard Nixon whose disclosure of a secret taping system in the White House dramatically shaped the Watergate scandal, ultimately leading to Nixon ...

Alexander Butterfield, the Richard Nixon White House aide who uncovered the Watergate tapes, died at the age of 99.

Alexander Butterfield, the White House aide who disclosed Richard Nixon's secret audio taping system, providing the "smoking gun" of the Watergate scandal that brought down the president, has died at ...

There is tape in the Oval Office,” said Mr. Butterfield, a former White House aide, in testimony that rocked the Watergate hearings and led to the president’s resignation.

Butterfield supervised the placement of a voice-activated recording system that operated at locations including the White ...

The White House aide who revealed that Richard Nixon had secretly recorded his conversations as president has died. Alexander Butterfield was 99. His death was confirmed to The Associated Press by ...

Add Yahoo as a preferred source to see more of our stories on Google. Richard Nixon - Bettmann/Getty Images There were a lot of tricky things about Richard Nixon. The 37th President of the United ...