From Dawn:
The following pictures are from a procession taken out in remembrance of the Karbala tragedy on the eve of Ashura in Karachi on Wednesday. Dawn.com takes a look at the various symbols prevalent in Muharram processions in Pakistan. Feature by Salman Siddiqui. Photos by WhiteStar/Fahim Siddiqi.
When Ashura comes, the main streets of Pakistani cities are filled with thousands of mourners. Streetlights turn into posts for black-colored flags as the towering Alams (flags) lead the Muharram procession that include a variety of Taazias and Zuljinah (Imam Hussain's legendary horse) to remember the battle of
that took place 1,300 years ago. Karbala
More here. And my own photos of an Ashura procession in NYC from 2007 are here.