Students in Parkland, Florida returned to their high school on Wednesday, two weeks after a gunman killed 17 people there.
The disputes have increased partly because of claims to undersea gas and oil.
Members of Hong Kong’s Roman Catholic community are worried about a possible deal between the Catholic Church and China’s leaders.
Chinese media say the Communist Party has proposed lifting term limits for the office of president from China’s Constitution.
The exhibit, called “Americans,” opened last month at the National Museum of the American Indian in Washington, D.C.
The American Lung Association (ALA) says fewer Americans smoke cigarettes now than before tobacco control policies were established.
Such gatherings are part of a Turkish effort to improve contacts with African leaders.
The Washington Post newspaper found that, since 1999, more than 150,000 children have experienced a shooting at their school.
The cost of higher education in the country has increased greatly over the past 30 years.
For the first time ever, scientists have succeeded in growing human eggs from the earliest stages to full maturity in a laboratory.