Is flying getting more dangerous? A plane collision near Washington DC has left no survivors, in a tragic accident President Donald Trump called “a dark and excruciating night in our nation’s history".
Skaters killed in horror plane crash
Tragedy: World champion Russian figure-skating duo, husband and wife Evgenia Shishkova and Vadim Naumov (above), were among 14 figure skaters reported to have been aboard the fatal American Airlines flight. Glossary
Supernova - A powerful and luminous explosion of a star.
Potomac River - A major river in the Mid-Atlantic region of the United States that flows from the Potomac Highlands in West Virginia to the Chesapeake Bay in Maryland.