Hashem Abedi, 22, is accused of encouraging his brother Salman to hold out the assault and allegedly obtained chemical compounds to make a selfmade bomb.
A jury heard how he acquired his hand on metallic containers to assemble the machine and located an tackle in Manchester to fabricate and retailer it.
He additionally allegedly purchased screws and nails for shrapnel and bought a Nissan Micra in April 2017 to retailer bomb-making tools.
The trial on the Old Bailey heard how after months of planning, experimentation and preparation by the brothers, Salman Abeidi detonated his suicide machine in a lobby as followers left an Ariana Grande live performance on May 22, 2017.
The bomb shoved in a rucksack was full of shrapnel and killed 22 individuals, the youngest of whom was eight-year-old Saffie Rose Roussos, who had been given her ticket as a Christmas current from her dad and mom.
Opening the case, Duncan Penny, prosecuting, mentioned: ‘The results of the ensuing explosion have been each sudden and deadly.
‘In all, 237 have been bodily injured along with these killed, while a complete of 670 individuals have since reported psychological trauma as a consequence of these occasions.
The 22-year-old defendant is accused of enjoying an equal half within the deaths of 22 individuals (Picture: PA)
‘The prosecution’s case is that this defendant is simply as guilty of the homicide of the 22 individuals killed as was his brother.
‘He is equally guilty of the tried homicide of many others and in doing so he was guilty of agreeing along with his brother to trigger an explosion or explosions of a nature prone to endanger life.
‘The bomb which was detonated was self-evidently designed to kill and maim as many individuals as attainable.
‘It was packed with lethal shrapnel and it was detonated in the middle of a crowd in a very public area – the intention being to kill and to inflict maximum damage.’
Hashem Abedi, initially from Manchester, denies 22 counts of homicide, tried homicide and conspiring along with his brother to trigger explosions.
The court docket heard how Manchester Arena was one of the biggest venues in Europe, with a capability of some 21,000 individuals.
The lobby, recognized as the City Room, was a gathering level for folks and household to gather younger concert-goers.
The space was full of teenage followers when the bomber, who had hyperlinks to so-called ISIS determined to detonate his machine.
Mr Penny added: ‘Such was the ferocity of this explosion that Salman Abedi was dismembered within the course of.
‘The scene that met the survivors and those that attended thereafter was one of destruction and chaos.’