Saudi Arabia's King Salman replaced the country's energy minister with one of his own sons on Sunday, naming Prince Abdulaziz bin Salman to one of the most important positions in the country as oil prices remain stubbornly below what is needed to keep up with government spending. The new energy minister is an older half-brother to 34-year-old Crown Prince Mohammed bin Salman and replaces Khalid al-Falih, who'd been in the ...