It was the first successful Islamist attack in Germany. Almost a year ago, Arid U. shot and killed two U.S. servicemen at Frankfurt's airport. On Friday, he was sentenced to life in prison.

It was just under one year ago that an Islamic extremist calmly boarded a bus at the Frankfurt airport before shooting to death two U.S. servicemen and severely wounding two others. On Friday, a Frankfurt court sentenced the man, Arid U., to life in prison. As requested by the prosecution, the court also found that the attacker bears "particularly severe guilt," meaning that he won't be eligible for parole after 15 years as is standard in Germany.

The shootings, which took place on March 2, 2011, represented the first Islamist attack in Germany that authorities were unable to prevent. The court also found U. guilty of three counts of attempted murder and serious bodily harm.

The attack occurred soon after the U.S. troops landed in Frankfurt from a base in the United Kingdom and were preparing to be bused to the U.S. Air Force Base at Ramstein before flying out to Afghanistan. Particularly incriminating was the patience that U. exhibited during the crime assault. He asked a soldier for a light and inquired if they were indeed heading for Afghanistan.

Upon receiving an affirmative answer, he opened fire, killing Senior Airman Nicholas J. Alden of South Carolina and Airman 1st Class Zachary R. Cuddeback from Virginia. He also shot Staff Sgt. Kristoffer Schneider, who has had extensive facial reconstruction surgery and who still suffers significant after-effects, and Senior Airman Edgar Veguilla, who was hit in the jaw and arm. U.'s gun jammed as he aimed at the head of a fifth soldier.