How a convicted terrorist became a US citizen

(CNN)A one-time Islamic jihadist who spent years in an Israeli prison for attempting to bomb a bus was granted US citizenship and allowed to remain in the country for nearly a decade as federal authorities investigated his background, CNN has learned.

The case of convicted terrorist-turned-US-citizen Vallmoe Shqaire raises questions not only about how Shqaire slipped past the enhanced vetting process implemented after 9/11, but also about why US law enforcement did not act more swiftly once his deception was discovered.