Experts couldn't measure just how bad the air pollution was because the sandstorm caused traditional measuring instruments to break.
An editorial in the North Korean Central News Agency accuses Beijing of "raising tensions."
Tony Kim is the third American being detained in North Korea.
Drone footage captured pits full of water that had been turned dark red by pollution.
Authorities have banned 22 social media sites, including Facebook and Twitter.
Employees at the factory in China typically work 60-hour weeks according to an audit by inspectors.
Activists say overfishing will have devastating consequences for the species.
Prime Minister Narendra Modi's crackdown on NGOs has drawn criticism from human rights groups.
Analysts spotted three volleyball games apparently underway at the Punggye-Ri site.
The Christian incumbent Ahok was accused of blasphemy after a doctored video of a speech he made went viral.
73 percent of respondents said they were concerned that they or someone they know will be a victim of the war on drugs.
One likened women to donkeys, while another said meat-eaters tell lies and commit sex crimes.
In North America, Thursday preview sales fell short of the "Furious 7" numbers from 2015.