UPDATE 2-Signet Jewelers US holiday same-store sales rise, stock jumps
- Ford leans on global Mustang to burnish overseas image
- Gunmen kill U.S. teacher in Libya's Benghazi
- Obama says he's not allowed iPhone for 'security reasons'
- U.S. fast-food workers walk off job, rally for higher minimum wage
- Special Report: Thailand secretly supplies Myanmar refugees to trafficking rings |