Security Tight After Tunisia Bomb Blast

At least 13 people were killed in Tuesday's apparent suicide bombing of a Tunisian presidential guard bus in central Tunis, prompting the government to declare a state of emergency and tighten security around the capital.

At least 13 people were killed in Tuesday's apparent suicide bombing of a Tunisian presidential guard bus in central Tunis, prompting the government to declare a state of emergency and tighten security around the capital.