Artificial flowers decorate barbed wire fence as Soviet army troops stop in Kabul, Afghanistan, in May 1988. The Soviet Union invaded Afghanistan in December 1979 to shore up the pro-Soviet regime in Kabul.
Douglas E. Curran/AFP/Getty Images
A woman places flowers at the Solovetsky Stone monument in front of the former KGB headquarters in central Moscow on Monday. Dozens of people gathered there to remember the victims of Soviet-era political repressions.
Yuri Kadobnov/AFP/Getty Images