An Al Qaeda-linked militant group waging war against Somalia’s fragile government is becoming an increasing threat to Western ally Kenya and could potentially destabilize the region with dire consequences for global security, officials and analysts warn. Al-Shabaab, one of the strongest Islamic militias battling for control of Mogadishu, has gained ground in recent weeks, according to officials, and has started to flex its muscles beyond Somalia’s border with terror strikes, kidnappings and recruitment drives.