ALSO ...

The U.S. Postal Service has dedicated its new Henry David Thoreau postage stamp at a ceremony at Walden Pond, where the 19th century American philosopher and naturalist spent two years in solitude and reflection. The ceremony took place Tuesday in Concord, Massachusetts.

Tedros Adhanom Ghebreyesus, a former Ethiopian minister of health, was elected Tuesday as the next director-general of the World Health Organization, becoming the first non-medical doctor and the first African tapped to lead the influential agency.