NATO leaders agreed on a massive hike in defense spending Wednesday after pressure from US President Donald Trump, and expressed their “ironclad commitment” to come to each other’s aid if attacked.

The White House is scrambling to address growing questions about its military strikes on Iranian nuclear sites.

The North Atlantic Treaty Organization (NATO) has announced an increase in its defence spending target, with member countries now expected to allocate 5 per cent of their GDP to defence by 2035.