Attacks on Saudi oil expose Iraqi PM’s struggle to control armed factions

As black smoke billowed over Saudi Arabia’s East-West oil pipeline, the repercussions of the drone attack were already reaching across the border into Iraq.

The strikes, launched from Iraqi territory, threatened about 4 percent of global oil supplies and helped push Brent crude above $108 a barrel. But they also presented Iraqi Prime Minister Ali al-Zaidi with perhaps the clearest test yet of hi...