When the Czech Republic accused Russia last month of staging an explosion at an ammunition depot in the country that killed two people in 2014, it provided shocking new evidence of the Kremlin's secret war against its perceived rivals in the West, prompting a major rift in Czech relations with Russia. The scandal broke just days after the sacking of Czech Foreign Minister Tomas Petricek, who frequently warned against risks posed by the Kremlin. He joins Greg and Jonathan to discuss the fallout from latest developments and what Europe and the US must do to address the challenge.