What three traits do all 19 individuals involved in the plane attacks have in common?

The 19 individuals involved in the plane attacks on September 11, 2001, shared several common traits: they were predominantly young men, mostly in their 20s and 30s; they were motivated by a radical interpretation of Islamic ideology; and they had received training and support from organized terrorist networks, particularly al-Qaeda. Additionally, they exhibited a high level of commitment to their mission, often displaying significant planning and coordination in executing the attacks.