Inside Sweden's Cold War Stay-Behind Operation

The Kremlin is not a fan of Alex Goldfarb. He left the Soviet Union as a scientist, becoming a prominent author and human rights activist. In 2006, he was in the room with ex-FSB officer Alexander Litvinenko, reading his dying words, which accused Vladimir Putin of assassination by radioactive polonium. Today, Alex's memoir, Refusenik's Son, traces a complicated family history made clear only decades later. His father, David, was a Jewish scientist denied permission to leave the Soviet Union - one of the so-called "refuseniks." David had been a prominent microbiologist in the 1970s and '80s, when Moscow's secret bioweapons program was under development. But only after an exiled KGB officer contacted Alex in 2010 did the full reason for his father's confinement become clear. It's a winding story involving an anthrax accident and a media leak, a Soviet scientist and a U.S. journalist trying to help him. Two men pulled unknowingly into a tide of suspicion.

Correction: At 3:27, Bojan Pancevski refers to the “Danish” military intelligence agency. He meant the Dutch military intelligence agency, which picked up the intelligence and passed it to the CIA.

In the spring of 1944, three elite commandos parachuted into Hungary. The country was aligned with Nazi Germany, and these men intended to be captured in what was meant to look like a failed operation. Their real mission was to help Hungary switch to the Allied side. But three days later, Germany launched a preemptive invasion. The men were captured by the Nazis, imprisoned, and interrogated. They used their interrogation as a chance to fool Adolf Hitler into thinking an Allied invasion would come from southeastern Europe, drawing German troops away from Normandy ahead of D-Day. Author Jason Bell unravels this daring and untold story in his new book, Operation Sparrow.

Before he became one of the world's most notorious terrorists in the 1970s and '80s, inspiring movies, books, and future terrorists, Carlos the Jackal was born Ilich Ramírez Sánchez to a privileged family in Venezuela. Over time, his crimes grew bolder, from an attempted assassination to abductions, murder, hijackings, and bombings. Some state leaders tolerated him out of fear he would target their countries, yet his alliances with militants and dictators soured as the years passed. In his new book, The Jackal: The Rise and Fall of Carlos, the World's First Super-Terrorist, journalist Joby Warrick profiles the mercenary terrorist and details how American and French intelligence took him down.

It's a dark moment in American history that leads to a lot of what-ifs. By the spring of 1963, eight years into the Vietnam War, two opposing factions across the CIA and the State Department had President John F. Kennedy's ear. One side wanted to keep South Vietnam's first president, Ngô Đình Diệm, in power. The other wanted to see him removed. Then, unrest in Saigon caught the CIA by surprise, and the rift in Washington grew deeper. Author Jack Cheevers spent a decade piecing together and writing Kennedy's Coup, which lays out the grave decision to oust Diem, a move that led to his death and, arguably, escalated the war. The first U.S. combat troops deployed two years later.