The Hajj is a journey of a lifetime for Muslims from all over the world.<br /><br />This year, around 2.8 million pilgrims have gathered in Mecca, many spending their life savings on the trip.<br /><br />But for one group of Pakistanis, the challenge has been especially difficult, because of what they say are broken promises.<br /><br />Al Jazeera's Sohail Rahman reports from Mecca.