No joke.

NEW YORK – Documents released by the US Director of National Intelligence on Wednesday reveal Osama bin Laden’s determination to carry out mass casualty attacks on America in the years leading up to his death.

US Navy SEALS retrieved the cache from the Abbottabad compound in which Osama bin Laden was assassinated in May 2011.

The tranche provides a glimpse into the mind of the Al Qaeda chief, revealing the duality of a man who spoke with affection about his family while simultaneously plotting mass murder on the American homeland.

A cache of 103 documents include letters sent between bin Laden and members of the al Qaeda network around the globe, as well as more intimate notes sent between family members, which included four wives and 20 children.

The trove also boasts letters written by bin Laden ahead of his son Khalid’s wedding, an event he says “our hearts have been looking forward to,” as well as documents detailing the group’s accounts and an application form for prospective al Qaeda members, which includes the remarkable line: “Who should we contact in case you became a martyr?”