discussion

No further details on the discussion have been released.

"It's most important that discussions about autism are grounded in science, compassion and most importantly the living experiences of people with autism themselves," he said.

"They provide heads of state and government with a good excuse to break existing schedules for urgent discussions on current problems without arousing public expectations," he wrote in his book, Diplomacy: Theory and Practice.

The Vatican foreign minister described the Pope's ability to scythe through difficult subjects with clarity, reminding officials, for example, to remember migrants as human beings and not just "numbers" in their discussions about them.

Trump said Crimea "was lost years ago" and was currently "not even a point of discussion".