mecca two million pilgrims participate haj week begin return mecca sunday final prayers world large annual gather muslims wind senior saudi officials say rituals past see deadly stampede fire riot authorities sometimes struggle respond go without incident mecca province governor prince khaled al-faisal head central haj committee call year pilgrimage success proud today offer service proud brothers participate proud pilgrim come land assist success season tell reporters mina east mecca thousands pilgrims participate symbolic stone devil part haj rituals jamarat return mecca nightfall mecca grand mosque crowd worshippers saudi arabia stake reputation guardianship islam holy sit organize pilgrimage 2.3 million pilgrims come saudi arabia year abroad five-day ritual attendance religious duty lifetime every able-bodied muslim afford organization excellent crowd anything things go well thank god say yemeni pilgrim rashid ahmed 100,000 members security force 30,000 health workers hand week maintain safety provide first aid crush 2015 kill nearly 800 pilgrims accord riyadh two large group pilgrims arrive crossroads east mecca count countries repatriate body show 2,000 people may die include 400 iranians tehran send nearly 90,000 pilgrims haj year boycott event last year amid diplomatic rift riyadh saudi health minister tawfiq al-rabeeah say pilgrimage pass without outbreak disease perennial concern tell reuters interview late saturday ministry also provide care 400,000 people include 21 open-heart surgeries keen offer excellent service pilgrims return home good health complete haj say pilgrims return mecca haj wind without incident