Who is Saudi Arabia's new crown prince Mohammed bin Salman?

The youngest defence minister in the world, and the first in line to the throne, 32-year-old Crown Prince of Saudi Arabia Mohammed bin Salman Al Saud is also the kingdom's deputy prime minister.

Mohammed bin Salman, who replaced his cousin - 57-year-old prince Mohammed Bin Nayef - as crown prince on Wednesday, is known to be pragmatic on domestic issues and keen on aggressively countering the influence of Iran.

Al Jazeera's Rob Matheson reports.

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