<span style="color: #222222;">Al-Shabaab Islamist terrorists have claimed responsibility for Saturday's massive car bombing in the Somalia capital Mogadishu that killed 81 people, including two Turkish citizens. <br />''<br />''The attack hit a busy checkpoint in the southwest of the city, killing 81 people, including a dozen university students, in the country's deadliest assault in two years. Mogadishu is regularly hit by attacks by Al-Shabaab, which has fought for more than a decade to topple the Somali government. In 2010, Al-Shabaab declared its allegiance to Al-Qaeda.</span><br />