Panorama travelled to Russia and the Ukraine to find out more about Russian gas giant Gazprom.
Reporter Steve Bradshaw visited the ISKRA glass factory in Lvov, western Ukraine.
Pictured here is the Ukraine Parliament.
Workers at the ISKRA glass factory in Lvov.
The Naftogaz compressor station, also in western Ukraine.
The interiror of a Ukraine Orthodox Church.
The Kremlin in Moscow is the seat of Russian power.
St Basils Cathedral sits next to the Kremlin.