A whistleblower who spoke out about safety concerns at a nuclear weapons site in Washington state has been fired from her job. Donna Busche had complained of retaliation after filing safety complaints related to the cleanup of the Hanford nuclear site, which is the most polluted nuclear weapons site in the United States. She was fired from the San Francisco-based firm URS Corp. on Tuesday. At least two other top project officials at the site have reportedly been fired or have left under pressure after raising safety concerns.