In a world marked by violence, "the choice of nonviolence as a style of life is increasingly demanded in the exercise of responsibility at every level," the pope said.

Government licenses and German arms exports had risen 96 percent in 2015 to a value of $13.6 billion, a priest said.

The new procedures are intended to fix problems linked to mitochondria, the energy-producing structures outside a cell's nucleus.

Syrian TV showed live footage of a long convoy of ambulances and green buses driving out of Aleppo.

The headquarters of America sit just one block from Trump Tower.