Why Yemen's war is escalating

Loud explosions have been heard at Riyadh airport. Diplomatic sources say that Yemen's Houthi fighters have launched another missile attack on the international hub. At least five people have been treated for extensive injuries, according to hospital sources, with dozens more injured. The Saudi government hasn't yet commented, as more airlines cancel flights to the country. Meanwhile, Saudi jets continue to strike Yemen, in support of the Yemeni government involved in fierce fighting to push back Houthi positions.

For more, we speak to Adam Baron, a Fellow at the New America think tank specializing in Yemen and the Gulf. Adam previously reported from Sanaa from 2011 to 2014.