From the moment he was appointed last year, Defense Secretary Chuck Hagel had a troubled relationship with President Barack Obama's tight-knit White House national security team. As the bombing intensified in Iraq and Syria, so did his problems.
Reuters: Behind Hagel’s ouster, tensions over Syria and Obama’s team
US President Barack Obama announces the resignation of US Secretary of Defense Chuck Hagel (L) in the State Dining Room of the White House in Washington, DC, Nov. 24.
