NEW : The Pentagon threatens legal action against the author . NEW : It says Bissonnette has violated secrecy agreements he signed . CNN 's Joe Sterling contributed to this report . Bissonnette says he was 575,000 of the Bissonnette who finished off bin Laden . bin Laden was a chief petty officer when he left the Pentagon .
NEW : The Pentagon threatens legal action against the author . NEW : It says Bissonnette has violated secrecy agreements he signed . Bissonnette says he was 575,000 of the Bissonnette who finished off bin Laden . bin Laden was a chief petty officer when he left the Pentagon .