G7 commits to 'rules-based trading system' despite tensions with US

All the G7 nations have agreed at their summit in Canada on the importance of a "rules-based trading system", despite tensions with the US. The joint statement signed by US President Donald Trump and his counterparts comes amid a row over high US tariffs imposed this month on steel and aluminium imports. The EU and Canada have taken steps to retaliate. Mr Trump says tariffs are needed to reverse America's trade deficit. Soon after the joint statement was announced, the US president tweeted defiantly about not allowing "other countries to impose massive tariffs and trade barriers on its on farmers, workers and companies".