G8 leaders are gathering in Northern Ireland - but differences between Russia and the US over what to do on Syria are already looming large.
US President Barack Obama has thanked his Russian counterpart for his role in achieving a nuclear agreement with Iran. Washington says the two leaders also pledged to work to reduce tensions in Syria.
The UK has to stay in the EU, Barack Obama says. Only then will it be able to continue to play a role on the international stage. More than anything, he has US interests in mind, Gero Schliess writes in Washington.
In their first call since February, Russian President Vladimir Putin has phoned US President Barack Obama to discuss the Ukraine crisis. Also on the agenda were Iran nuclear talks, "Islamic State" and Syria.
A nuclear arms deal reached by Iran and six world powers on Tuesday has been hailed by many leaders with hope for the world's security. Others, however, have remained skeptical of Iran's attitudes to terrorism.