Dan Mitchinson: US correspondent on President Joe Biden having to prove himself at NATO summit - Heather du Plessis-Allan Drive

Joe Biden's appearance at this week's NATO summit came with additional pressures ahead of the US election.

Less than two weeks after Biden's shaky debate performance, Biden was under extra scrutiny on the world stage.

US correspondent Dan Mitchinson says Biden sounded better during his first address - but he still has to contend with further global exposure.

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