Brother Of Manchester Arena Bomber Sentenced To Minimum Of 55 Years

The video discusses the sentencing of an individual to at least 55 years in prison for his role in the 2017 attack at an Ariana Grande concert in the UK, which resulted in 22 deaths. The court found him equally guilty as his brother, who detonated the bomb. Families of the victims criticized him for not attending his sentencing, calling him a coward.

What event was taking place when the attack occurred?

What did the families of some victims call the individual who stayed in his cell during sentencing?