To get to the front lines of Iran’s conflicts in Syria and Iraq, war photographers must overcome the fact that hardly anyone wants them there.

For nearly a year now, Yemen has been torn by a ferocious war pitting rebels, known as Houthis, and forces fighting for former President Ali Abdullah Saleh against fighters loyal to exiled President Abed Rabbo Mansour Hadi.

Gathered here are images from a deeply-fractured Yemen, taken over the past few months

A coalition of Arab countries led by Saudi Arabia launched a campaign of airstrikes on Yemen

or two years, between 2011 and 2013, the former Syrian military photographer known only as Caesar used a police computer in Damascus to copy thousands of photographs of detainees who were tortured to death in Bashar al-Assad’s jails. The media have run numerous stories about the man who managed to smuggle astonishing evidence of crimes against humanity out of the country – at great risk to himself and his family – but he had never been interviewed.