Defence chief quits Obama’s cabinet

US Defence Secretary Chuck Hagel has resigned as part of the first major change to President Barack Obama’s Cabinet since his Democrats were routed in mid-term elections three weeks ago.
Hagel is leaving under pressure following a rocky tenure in which he has struggled to break through the White House’s insular team of national security advisers. His departure comes as the president’s national security team has been battered by crises including the rise of Islamic State militants in Iraq and Syria and Russia’s provocations in Ukraine.