What information about the incident did president johnson withhold from congress and the american people?

The attack on the destroyer Maddox, on August 1964 by North Vietnam never happened.

Explanation:

The attack on the destroyer Maddox, on August 4, 1964 by North Vietnam never happened and president johnson withhold the information from congress and the american people until it was finally made public in 2007 when an official National ­Security Agency (NSA) history of signals intelligence (SIGINT) in Vietnam, written in 2002, was released in response to a Freedom of Information Act request. The incident is known as Gulf of Tonkin Incident.

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