This clip examines the Cold War Era and the end of the Soviet Union.

Here's the standard high school history class summary of the Soviet Union: The Union of Soviet Socialist Republics (USSR) was a communist state from 1922 to 1991 and was a big rival of the US from WWII to the end of the '80s. But what...

It’s hard for those of us in the modern era to grasp the true horror of the Chernobyl disaster. Even a deep dive into the Chernobyl meltdown timeline can only reveal so much about the very real, visceral consequences of the event....

Mikhail Gorbachev, who has died aged 91, was revered in West but criticised by many Russians for overseeing end of USSR.

In power between 1985 and 1991, Mikhail Gorbachev sought to transform the Soviet Union with democratic reforms.

Brian Mulroney speaks about how Mikhail Gorbachev was a good friend to him, and a 'transformative leader' who worked for peace.

Former Soviet leader Mikhail Gorbachev, who’s credited with ending the Cold War without bloodshed, has died at age 91. As the last leader of the Soviet Union before it disbanded, he leaves behind a divisive legacy.

Former Soviet leader Mikhail Gorbachev, who died Tuesday at 91, is being remembered in the West as a leader who ended the Cold War, but his legacy is quite different in Vladimir Putin's Russia.

Residents of St. Petersburg were split on how they viewed Mikhail Gorbachev, with some remembering him as an inspirational figure, while others reflected more upon the fall of the Soviet Union in the wake of Gorbachev's internal reforms.

Western leaders are remembering Mikhail Gorbachev, the last leader of the Soviet Union.

While Western Europe praised the last Soviet leader, the Baltic country was openly critical about his legacy.

The USSR was formally dissolved on 26 December 1991.

#GRAVITAS | U.S. President Donald Trump has announced plans to introduce a $5M “gold card” programme for wealthy foreigners, granting them the right to live and work in the country with a pathway to citizenship which also includes...

At Mikhail Gorbachev's 80th birthday Ted Turner at Royal Albert Hall on March 30, 2011 in London, England (Footage by Getty Images)

Georg Kindel, Teri Hatcher, and Mikhail S Gorbachev at the Women's World Awards Press Conference Hosted by Teri Hatcher and Mikhail Gorbachev at the Beverly Hilton in Beverly Hills, California on April 6, 2006. (Footage by WireImage...

Berlin . (Footage by WireImage Video/GettyImages)

Mikhail Gorbachev arrives for Gorby 80 at The Royal Albert Hall Mikhail Gorbachev at Royal Albert Hall on March 30, 2011 in London, England (Footage by WireImage Video/Getty Images)

Georg Kindel, Teri Hatcher, and Mikhail S Gorbachev at the Women's World Awards Press Conference Hosted by Teri Hatcher and Mikhail Gorbachev at the Beverly Hilton in Beverly Hills, California on April 6, 2006. (Footage by WireImage...

Teri Hatcher speaking at the Women's World Awards press conference in Los Angeles at the Women's World Awards Press Conference Hosted by Teri Hatcher and Mikhail Gorbachev at the Beverly Hilton in Beverly Hills, California on April 6,...

Mikhail S Gorbachev speaking at the Women's World Awards press conference in Los Angeles at the Women's World Awards Press Conference Hosted by Teri Hatcher and Mikhail Gorbachev at the Beverly Hilton in Beverly Hills, California on...

Mikhail Gorbachev walks down staircase to meet East German leader Erich Honecker and pose for photocall during 40th Anniversary ceremony / Gorbachev, Honecker and others along into conference room / General views of conference centre and...

WireImage Entertainment Report: 2/10/09 (Footage by WireImage Video/GettyImages)

Interview with Sharon Stone QTV: Mikhail Gorbachev's 80th Birthday Gala Arrivals at Royal Albert Hall on March 30, 2011 in London, England (Footage by Getty Images)

People pay their final respects to the last leader of the Soviet Union, Mikhail Gorbachev, in a ceremony held in Moscow with little fanfare and with President Vladimir Putin notably absent (Footage by AFPTV via Getty Images)