Suicide blast rips through shrine in Pakistan
At least 20 killed during Shiite religious festival near Islamabad

ISLAMABAD, Pakistan - A suicide bomber set off explosives Friday in the midst of Shiite Muslims reciting the Quran, killing at least 20 and wounding dozens gathered for a religious festival at a shrine near the capital.
The motive was not immediately clear, but there are frequent sectarian attacks in this Islamic country by extremist elements of the Sunni and minority Shiite sects.
The schism between Sunnis and Shiites dates back to a 7th century dispute over who was the true heir to the Prophet Mohammed.

They need to keep those disputes fresh in everybody's minds. No sense in letting an old feud die off from neglect.