President Obama announced the death of Al-Qaeda leader Osama Bin Laden Sunday night. He is best known for spearheading the 9/11 attacks, among other things. "Bay Area residents said Sunday that word of Osama bin Laden's death had brought relief and a sense of a weight being lifted, along with some concern for the future," reports the Chronicle. And while "Osama is Dead" t-shirts are now readily available, Al-Qaeda vows retaliation.

As the Appeal points out, SFPD have warned officers and the public to be alert this morning to possible demonstrations or public gatherings following the death of Osama bin Laden.

Here are some images of reactions from around the world.