The terrorism trial of Dzhokhar Tsarnaev opened with the prosecutor describing how the defendant and his brother, Tamerlan, placed homemade bombs in their backpacks on an ideal day in 2013. They then calmly strolled to the finish line of the Boston Marathon to "punish America for wars in Muslim territories."

Three people died and 264 were maimed and injured. Days later, a police officer and Tamerlan were killed in shootings as the brothers attempted to escape a massive manhunt.

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But America was never punished.

Tsarnaev was convicted Wednesday on all 30 federal charges and could face the death penalty. Two years after the attack, Boston remains strong, and survivors and families of those murdered speak eloquently of the challenges of moving ahead. And in a courthouse three miles from the finish line, a 16-day trial took place in which piles of evidence were introduced to prove that Tsarnaev was guilty of the crimes he readily admitted. The proceedings were uneventful despite cries for him to be treated as an enemy combatant in a military tribunal.

The jury twice asked the judge for help to make sure it correctly understood the terms conspiracy, and aiding and abetting.

Instead of punishing America, the pair put our system and the resilience of our social fabric in the face of evil on display for the world.