Vice President Joe Biden and President Barack Obama
Joe Biden (left) and Barack Obama (right) in 2009
| Credit: Mark Wilson/Getty
One of the most notable examples of their collaborative decision making was during the May 2011 mission that ultimately killed al-Qaeda leader Osama bin Laden.
In his memoir
A Promised Land, Obama said that Biden urged caution. "Joe weighed in against the raid," he wrote.
President Obama Announces Death of Osama Bin Laden
Barack Obama with Joe Biden, Hillary Clinton and members of the national security team
| Credit: Pete Souza/The White House via Getty
"As had been true in every major decision I'd made as president," Obama continued, "I appreciated Joe's willingness to buck the prevailing mood and ask tough questions, often in the interest of giving me the space I needed for my own internal deliberations."