Watch part twoOne month into its battle against Yemen's Houthi fighters, Saudi Arabia is vowing to rid the country of infiltrators. For Saudis, the Houthi incursion into their territory is emblematic of a much bigger and potentially more dangerous problem.
If Houthi fighters can cross into their territory so too can al-Qaeda operatives now based in Yemen.
On Thursday, we look at the multiple political and strategic challenges facing the Kingdom of Saudi Arabia today including the counter claims of those who seek democratic reform and those who support a conservative brand of Islamic rule.
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