Former US national security advisor Sandy Berger, who aided president Bill Clinton during the Balkan wars, died Wednesday, according to his colleagues.
Berger, 70, "passed away early this morning, surrounded by his family," according to a statement from the Albright Stonebridge Group, a consultancy firm he worked with.
Berger spent four years as the top national security official at the White House, between 1997 and 2001.
He guided Clinton though the NATO bombing campaign in the former Yugoslavia, the Northern Ireland peace process and a host of other security challenges.
"Our country is stronger because of Sandy's deep and abiding commitment to public service, and there are countless people whose lives he changed for the better. I am certainly one of them," said former Clinton secretary of state Madeleine Albright.
Out of office, Berger's reputation was tarnished when it was revealed that he took classified documents related to Clinton's presidency from the National Archives.
But he remained an influential voice in Washington, including recently voicing his support for the nuclear deal with Iran.