Snow at Davis-Monthan Air Force Base, well-deck operations aboard the USS Essex, National Guard troops in Washington, and more in this week's Frontline Photos.
A study of Marine recruits found that despite these measures and strict quarantines before they started training, the recruits spread the virus to others even though hardly any of them had symptoms.
The painting depicts the Royal Navy second-rate ship of the line Temeraire, which helped win the 1805 Battle of Trafalgar, being hauled away by a tug at the end of its life.
