Is a free press one of the greatest of human achievements? As an American journalist languishes in a Russian prison cell, many are reflecting on how rare and precious freedom is.
Jailed reporter not losing hope despite food
Evan Gershkovich: The first American reporter to be arrested on spying charges in Russia since the Cold War. Glossary
anti-Semitic - Showing hatred or prejudice towards Jewish people.
Alfred Dreyfus - A French soldier with Jewish ancestry who was convicted of treason in 1894 and later exonerated.
Richard Nixon - The 37th US president, who served from 1969 to 1974. He was a Republican.
Democratic Party - The left-leaning US political party.
Watergate scandal - A major 20th Century US political scandal, involving a break-in at the Democratic Party offices in 1972. It led to the resignation of the then-president, Richard Nixon.
Sheffield - A city in South Yorkshire in England.