As the conflict in the Middle East continued to simmer, U.S. President Donald Trump headed to the Netherlands for his first summit-level meeting with NATO allies since returning to the White House in January.

Europe braces for Trump's arrival at the Nato summit with difficult questions over Iran and defence, following the 5% defence spending target he's demanded of allies

NATO leaders gather Tuesday in The Hague for what could be a historic summit, or one marred by divisions.