As news of the accident poured into the global media, the public was assured there were no radiation releases.
That quickly proved to be false.
The public was then told the releases were controlled and done purposely to alleviate pressure on the core.
Both those assertions were false.
The public was told the releases were "insignificant."
But stack monitors were saturated and unusable, and the Nuclear Regulatory Commission later told Congress it did not know---and STILL does not know---how much radiation was released at Three Mile Island, or where it went.