Ravens' John Urschel shares his love of math with Franklin High students
The Baltimore Sun

Examining the lake

Vietnamese soldiers and an investigator observe a reservoir next to Sen Lake in Da Nang, Vietnam. The lake was contaminated by pollution from a Vietnam War base where the U.S. military stored herbicides. More than 30 years later, there are still high levels of toxins in the area.Tribune photo by Kuni Takahashi