A Bedouin man jumps over camels during celebrations marking the Sanaa Summer Festival in Sanaa, Yemen, on Aug. 20, 2013. The two-week festival kicked off on Tuesday aiming at boosting tourism in this unrest-ridden Arab country.(Xinhua/Mohammed Mohammed)

A Bedouin man dances during celebrations marking the Sanaa Summer Festival in Sanaa, Yemen, on Aug. 20, 2013. The two-week festival kicked off on Tuesday aiming at boosting tourism in this unrest-ridden Arab country.(Xinhua/Mohammed Mohammed)

A Bedouin man dances with swords during celebrations marking the Sanaa Summer Festival in Sanaa, Yemen, on Aug. 20, 2013. The two-week festival kicked off on Tuesday aiming at boosting tourism in this unrest-ridden Arab country.(Xinhua/Mohammed Mohammed)

A Bedouin man dances with swords during celebrations marking the Sanaa Summer Festival in Sanaa, Yemen, on Aug. 20, 2013. The two-week festival kicked off on Tuesday aiming at boosting tourism in this unrest-ridden Arab country.(Xinhua/Mohammed Mohammed)

Three Bedouin men dance during celebrations marking the Sanaa Summer Festival in Sanaa, Yemen, on Aug. 20, 2013. The two-week festival kicked off on Tuesday aiming at boosting tourism in this unrest-ridden Arab country.(Xinhua/Mohammed Mohammed)

Two Bedouin men perform tranditional dance during celebrations marking the Sanaa Summer Festival in Sanaa, Yemen, on Aug. 20, 2013. The two-week festival kicked off on Tuesday aiming at boosting tourism in this unrest-ridden Arab country.(Xinhua/Mohammed Mohammed)

A Bedouin man jumps over camels during celebrations marking the Sanaa Summer Festival in Sanaa, Yemen, on Aug. 20, 2013. The two-week festival kicked off on Tuesday aiming at boosting tourism in this unrest-ridden Arab country.(Xinhua/Mohammed Mohammed)