Saudi Arabia and their allies need to think again about the bombing campaign in Yemen. They are nowhere close to breaking the will of the Houthis, their main target.

The Houthis started as insurgents from north Yemen. Last September, with the co-operation of the former President Ali Abdullah Saleh and his considerable forces, they took the capital, Sanaa.

King Salman, Saudi Arabia's new monarch, put together a coalition to attack the Houthis when in March they looked close to capturing Aden, the main city in the south.

Since then Yemen, the poorest Arab country, has been bombed daily by a coalition that includes the richest Arab countries.