1.   Carbon filament was also difficult and expensive to manufacture, involving hammering and shaping individual pieces of carbon and baking them in a furnace.

2.   Earlier this month, the alliance started using the special cluster bombs that disperse carbon filaments across wires that conduct electricity, short-circuiting the transformers.

3.   NATO has acknowledged its use of special cluster bombs that disperse carbon filaments on supply lines to cause massive short-circuits.

4.   The NATO weapons also included special cluster bombs with carbon filaments that cause damage to wires conducting electricity, the media said.

5.   The widespread power outages came as NATO jets reportedly dropped special cluster bombs with carbon filaments that cause damage to wires conducting electricity, Yugoslav media reported Saturday.