President Barack Obama will visit New York City on Thursday to mark the death of the world's most wanted terrorist, al-Qaida leader Osama bin Laden.

The White House says that while in NYC, Mr. Obama will visit Ground Zero, the site of al-Qaida's attack on the World Trade Center, where some 2,595 were killed on September 11, 2001.

As part of his visit -- which was announced by the White House via twitter -- the president will also meet with the families of those killed.

Rachel Uchitel left the sober living facility she has been staying at in Malibu, but did so with Dr. Drew Pinsky's permission, a source close to the situation tells us.

"Rachel and Dr. Drew visited Ground Zero last Thursday. The aim of the visit was to be completely cathartic for Rachel because her fiancee, James Andrew O'Grady worked in the Twin Towers and was killed on 9/11. Rachel has told friends that was when her life began to unravel, after she lost James. The visit was extremely emotional for Rachel, but it did give her a sense of closure, as much as someone can have that has lost someone under such horrific circumstances. Dr. Drew was with Rachel for the visit, to give her support, and advice as she goes forward with her recovery," a source close to Rachel tells us.