SOMINI SENGUPTA

The United Nations Security Council voted unanimously on Wednesday to adopt tougher sanctions against North Korea, reflecting closer cooperation between the United States and China on a longstanding dispute.

Airstrikes hit four hospitals in rebel-held northern Syria on Monday, including child and maternity facilities, international aid officials and witnesses reported. The United Nations said at least 50 people were killed, including children.

In the hills near the Lebanese border, an hour’s drive from downtown Damascus, much of a Syrian town is starving, according to residents and international humanitarian workers.

President Barack Obama personally apologized Wednesday to the head of Doctors Without Borders for what he described as the mistaken bombing of its field hospital in Kunduz, Afghanistan, promising a full investigation into the episode, which took the lives of nearly two dozen doctors and patients.

As students complain, taunt and sometimes cry out for help on social media, educators have more opportunities to monitor them around the clock.

The agency in charge of border protection is increasingly offering the drones it already owns to a variety of domestic law-enforcement agencies and has considered equipping them with "nonlethal weapons," according to documents recently made public.