JUDY WOODRUFF:

Diplomats from Europe, the Middle East and the U.S. met in Geneva today to iron out a resolution that would establish an international inquiry into atrocities in Yemen.

Saudi Arabia and its allies are aligned with one faction of Yemen's civil war. They stand accused of causing massive civilian casualties amid a punishing bombing campaign, with American support. The Saudis deny this, and they say the time is not right for an international probe.

Meanwhile, in Yemen, a disastrous humanitarian situation continues to deteriorate.

William Brangham has that.