Intercontinental tunnels

In 2003, a strange event took place near Moscow (near the city of Solnnogorsk). A life jacket was discovered by Vladimir Sajchenko, the driver of the Věrešenská Rural Administration, in Lake Bězdonnoje. This would not be so strange, but it was strange that it had the inscription "US NAVY" and an identification mark confirming that it belonged to the sailor Sam Belowski from the American destroyer Cole, destroyed by a terrorist on October 12, 2000 in the port of Aden. How did he get there?

Before we continue, let's summarize a bit which places are probably related to the network of old intercontinental underground tunnels…