Article 155 has been called “the biggest taboo in the constitution” of Spain. That's because it grants unspecified but potentially broad powers to the government and could be used to forestall a push for Catalonian independence. Guy Hedgecoe reports.

But first we hear from Ruadhan Mac Cormaic about how malnutrition or even starvation threatens a staggering 24 million people in east Africa following three successive seasons of drought. Only a third of the aid money needed to prevent this catastrophe has been pledged. Where is the international outcry?