tunis tunisian navy rescue 98 tunisians flee europe boat start sink kerkenah southeast coast late saturday national guard say separately army say arrest 43 illegal migrants rescue four boat zarzis also southeast coast tunisia praise democratic progress 2011 uprise autocrat zine el-abidine ben ali successive governments fail create job young people head illegally europe seek work tunisia arrest 550 tunisian african migrants try sail europe september 170 august official data show thursday human traffickers increasingly use tunisia launch pad migrants head europe libya coast guard aid arm group tighten control water leak boat carry 98 migrants sink naval guard rescue coast kerkenah colonel major khelifa chibani tunisia national guard say tunisia rescue 140 migrants coast