Retired Marine General John Allen resigned as president of the Brookings Institute after he was accused of obstructing an FBI investigation into an alleged lobbying campaign for Qatar. EPA/MICHAEL ...

Retired Marine Gen. John Allen testifies during a Senate Foreign Relations Committee hearing on Capitol Hill in Washington, DC, on October 28, 2015. Allison Shelley/Getty Images CNN — ...

The Brookings Institution's president, retired four-star Gen. John R. Allen announced that he is resigning from the organization amid a federal investigation into his alleged role doing illegal ...

Retired Gen. John Allen wrote in a letter to the think tank that he was leaving with a "heavy heart" but did not offer a direct explanation. "I know it is best for all concerned in this moment ...

John R. Allen, a retired four-star Marine general who was the president of the Brookings Institution, had been accused of secretly lobbying for the government of Qatar. By Adam Entous and Mark ...

Retired four-star Gen. John R. Allen’s private counsel blasted federal investigators for a "damaging ethical breach" after agents seized electronic data potentially related to his alleged role ...

Retired Marine Corps Gen. John Allen, special presidential envoy for the global coalition to counter the Islamic (IS) group, testifies before the Senate Foreign Relations Committee February 25 ...

13 — and cooperated with federal prosecutors on the understanding that they were also investigating and pursuing criminal charges against retired four-star Marine Gen. John G. Allen. The latter ...

WASHINGTON — John R. Allen, the retired four-star general who once commanded American troops in Afghanistan, has been placed on administrative leave as president of the Brookings Institution ...

You may have heard of him, former Marine General John Allen. He led U.S. and NATO forces in Afghanistan and now heads one of Washington's most influential think tanks, the Brookings Institution.

The Department of Justice (DOJ) has dropped a criminal investigation into retired four-star Marine Gen. John Allen, who was accused of lobbying on behalf of the Middle Eastern nation Qatar.