Documents recovered at bin Laden's compound in Abbottabad, Pakistan, following the SEAL raid there on May 1, 2011, and since publicly released portray a rather tense relationship between al Qaeda and the Iranian authorities.

CNN: Strange bedfellows -- Iran and al Qaeda

Before he was killed that fateful night, Navy SEAL Tyrone Woods rescued scores of Americans from the compound.

CENTERFORSECURITYPOLICY: Center For Security Policy

The RQ-170 Sentinel was the type of stealth drone used to conduct surveillance on the compound used by Osama bin Laden in Abbottabad, Pakistan, before the May raid by Navy SEAL commandos that killed the al Qaeda leader.

WSJ: Iran Says It Shot Down Unmanned U.S. Plane