Calder Walton writes that if proved, Victor Manuel Rocha's espionage would place him among the longest-serving spies in modern times. Allowing him to operate as a spy in the senior echelons of the U.S. government for so long would represent a staggering U.S. security failure.

In an interview for The Times of London, Calder Walton recounts the history of the Concorde SST and the role that Soviet espionage played in it.

Calder Walton writes that China's clandestine services are on the front line of Beijing's grand strategy: to keep the Chinese Communist Party in power and to make China the world's leading and self-sufficient military and economic power. The aim is to invert the technological landscape so other countries depend on Chinese, not western, technology.

The Cold War started earlier than we think — and maybe never ended at all. Historian Calder Walton says understanding the US-Soviet conflict prepares us for this era of tensions with Russia and China.

Calder Walton recounts the succession of intelligence failures against the West over which Russian President Vladimir Putin has presided, the greatest of which being his decision to invade Ukraine.

Calder Walton says both seek to topple the United States from atop world stage, with China's blend of money, influence, all-hands-on-deck approach posing the greater threat.

Calder Walton writes that Soviet espionage inside the Manhattan Project would change history. By the end of World War II, Stalin's spies had delivered the secrets of the atomic bomb to the Kremlin. This accelerated Moscow's bomb project. When the Soviets detonated their first atomic weapon in August 1949, it was a replica of the weapon built at Los Alamos and dropped by the Americans on Nagasaki.

The riveting, secret story of the hundred-year intelligence war between Russia and the West with lessons for our new superpower conflict with China.

Paul Kolbe and Calder Walton analyze Russia’s arrest of Wall Street Journal journalist and US citizen, Evan Gershkovich, on espionage charges. This is the latest example of the Russian Federal Security Service's long practice of state-sponsored hostage taking and repression of the press. 

Calder Walton explains why, as the 20th anniversary of the U.S.-led invasion of Iraq passes, it is useful to understand how China's intelligence and national security establishment reacted at the time.