Yemen is preparing to host the Gulf's largest football tournament. br br But separatists in the country's south are threatening to target the event. br br Five people were killed last week after a bomb attack at one of the tournament's stadiums.br br A force of 30 000 troops will be deployed around the cities hosting the event to preempt any al-Qaeda infiltration from the neighbouring province. br br Al Jazeera's Hashem Ahelbarra reports from the city of Abyan.