The FlyDubai attacker copilot was known adopting radical ideological views and he was previously barred from flying

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"Despite the ban, the co-pilot, an Omani national, was hired by FlyDubai allowing him to pilot on the sensitive route connecting the United Arab Emirates and Israel, people familiar with the matter said. ..."

"... Prior Flight Ban: The Wall Street Journal first reported that al-Hammami had been explicitly barred from flying by Omani authorities after they grew concerned about his extremist beliefs. CNN later verified that he was terminated or removed from flight duties at Oman Air last year because of these security risks. ..." (Google Search)

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