ANDREW MILLS A gleaming white World Cup stadium looms large at the end of the street in the quiet suburban neighbourhood of Al Thumama. In three weeks, tens of thousands of soccer fans will file past the tidy villas, mosques and shops that line the route to the stadium due to host eight matches during the tournament. On Tuesday, the quarter was bracing itself for the November 20 kickoff of the World Cup: crowd control barriers on sidewalks, portable toilets beside houses and heightened home security. "We have to be careful. We have to secure our houses...all year we leave…