In the second, they are sent to Tibet to retrieve a German rocket scientist vital to the U.S. space program before the Soviets do. Danny and his wingmen test two new aircraft for the Navy, first the brand-new X-13 (based on the A-5 Vigilante), then the X-15. They must overcome rivalries within their own squadron, and root out several saboteurs hired by foreign powers and disgruntled aircraft constructors. When a revolution begins in the Southeast Asian nation of Vien-tan, the U.S. finds itself unable to intervene officially. Instead, Danny and thirty Navy pilots are retired from the service and sent to fight in Vien-tan, under the flag of the newly reconstituted Flying Tigers. One story arc and two stand-alone novels. In the story arc, Danny and his wingmen try to recover a Mercury space capsule lost at sea. In the first novel, he must defuse the threats of a Caribbean dictator bent on causing a nuclear war between East and West. In the second, he and his wingmen investigate the sightings of unidentified aircraft over the Arctic. Two story arcs. In the first, the Navy loses a nuclear weapon over the Central American republic of Managuay; Danny, Tumbler and Tuckson are infiltrated among the rebels who recovered it to try to steal it back. In the second, they enter the Blue Angels stunt team and are sent to a high-profile airshow in Karachi, where they must again face the threat of Lady X as well as deal with racial tensions within the squadron itself. Danny and his wingmen discover a Mafia-run opium plantation in the Bornean nation of North Sarawak. With the United States politically unable to act, the admiral in charge of the carrier group defies the Pentagon's orders and decides to take down the operation himself. NATO is being blackmailed by the International Front of Armed Revolutionary Groups, a red terrorist organization which has stolen a nuclear weapon and two F-14s from the U.S. military. Danny, Tumbler and Tuckson must locate the terrorists' base in the Caribbean before the Front can use the weapon on an upcoming UN summit. Two stand-alone novels, heavily influenced by international developments in the last few years of the Cold War. In the first, Danny is sent to Nellis to take charge of a defecting MiG-29 pilot. In the second, he is sent to visit the Soviet Union's newest aircraft carrier and finds himself swept up in a web of perestroika politics; some parties want him eliminated, while others want to use him for their own ends.