Hints and tips:
...Days after arriving, the three men were murdered by unknown assailants....
...However, its current capacity is unknown as oil infrastructure has been a key target of US-led strikes against Isis over the past three years....
...The Observatory said the pair were hit at night, along with a team of other technicians whose conditions are unknown....
...“These snacks were either unknown, or luxuries we couldn’t afford . . . But when the fighters requested them, I didn’t ask questions....
International Edition