Ashura is an annual Shia festival commemorating martyrdom of Imam Hussein.  Hussein, grandson of Prophet Mohammad, killed at Karbala by army of Caliph Yazid in 680. 
Annual Shia festival commemorating martyrdom of Imam Hussein
Hussein, grandson of Prophet Mohammad, killed at Karbala by army of Caliph Yazid in 680.   Faithful strike themselves with chains and swords to atone for Hussein martyrdom.  The murder 19 years earlier of Ali, Hussein’s father, gave rise to the central schism in Islam between Sunni and Shia

 Here in Dhaka many Biharis were observing this festival near the Towne Hall Bazaar.

Young men blow a mouthful of flammable liquid onto a torch which ignites and sends rings of smoke into the air if done properly.
Another young man blowing smoke rings.
The young fellow third from left wanted to have this shot taken.