1.   He said the rebels used the kidnappings as a form of forced recruitment.

2.   Large parts of Yemen remain lawless, and tribesmen have used kidnappings to pressure the government into providing money or projects.

3.   Large parts of the country remain lawless, and tribesmen have used kidnappings to pressure the government into providing money or projects.

4.   Large parts of Yemen remain lawless, and tribesmen have used kidnappings to pressure the government for money or projects.

5.   The group, now all but defeated, used kidnapping, extortion and collecting protection money from narcotics traffickers to finance its operations.

6.   The rebels use kidnappings to raise money.

7.   There was no comment from the rebels, who use kidnappings to finance their decades-old war.

8.   Tribesmen typically use kidnappings to pressure the government into providing new roads, water or clinics.

9.   Tribesmen in Yemen often use kidnappings to pressure the government for money or projects.

10.   Tribesmen in Yemen repeatedly have used kidnappings to pressure the government for money or projects.