The brother of Manchester Arena bomber Salman Abedi has been found guilty of murdering 22 people.
Hashem Abedi had denied helping to plan the sudden and lethal blast which killed or injured nearly 1,000.
The Old Bailey heard the pair worked together to source materials used in the suicide blast after an Ariana Grande show at the venue.
Prosecutors said Hashem wasjointly responsible with his brother for the attack on 22 May 2017.
The Manchester-born siblings stood shoulder to shoulder in the plot, with younger sibling Hashem just as guilty of murder as the bomber himself, the court heard.
Hashem was also found guilty of one count of attempted murder encompassing the remaining injured and conspiring to cause explosions.
Some of the victims family members burst into tears as the verdicts were delivered following a seven-week trial.
Men, women and children, aged eight to 51, were killed in the attack while 264 “were physically injured” and 670 more have since reported psychological trauma as a result of these events.
Duncan Penny QC, prosecuting, said the Abedi brothers had spent months planning the blast and had a shared goal [to] kill, maim and injure as many people as possible.
They worked together to source chemicals and buy screws and nails to use as anti-personnel shrapnel in experimental improvised bombs, the court was told.
Although Hashem was in Libya when the device was detonated he was just as guilty, Mr Penny said.
Greater Manchester Police said Hashem may have been the senior figure in the plot, and intended to cause further bloodshed around the world.
Det Ch Supt Simon Barraclough said: He was with his brother throughout the entire process of making this explosive and building this bomb, I believe he provided encouragement right up to the end.
This was all about the sick ideology of Islamic State and this desire for martyrdom.