According to confidential sources, an investigation into Brian Williams has revealed 11 instances in which the journalist embellished details of his reporting. NBC began to examine Williams' reporting after his account of coming under rocket fire on a helicopter during the Iraq War was challenged by soldiers involved in the flight.

The investigators, led by NBC News senior executive producer Richard Esposito, have also raised doubts about Williams’ comments about his experiences covering Israel’s military action against Hezbollah in Lebanon in 2006. In an interview with a student-run television station at Fairfield University in Connecticut in 2007, Williams said he saw rockets passing “just beneath” the Israel helicopter in which he was traveling. But Williams gave a less harrowing account of the same trip in an NBC News blog a year earlier.

Last week, executives met for a briefing on the investigation findings: NBC Universal chief executive Steve Burke, NBC News chairman Andrew Lack and NBC News president Deborah Turness.

There's no word if the findings of the investigation will ever become public. The Washington Post writes, "Although the investigation could be a critical factor in whether NBC decides to bring Williams back, it could also remain confidential as a condition of any potential severance agreement, an NBC journalist said on Friday."