 Complete the following phrase:  Bulgheroni obtained, in 1992, some of the first gas exploration concessions granted in Turkmenistan to a foreign energy company. He was further involved during 1997 in negotiations between Bridas and the ruling Taliban faction in Afghanistan to build the Trans-Afghanistan Gas Pipeline from Turkmenistan to Pakistan. These negotiations were in competition with those undertaken by Unocal, and although an agreement with Unocal-led corporation CentGas was reached, the deal was forfeited in January 1998 in favor of one with Bridas. Instability in Afghanistan delayed construction of the pipeline, however, and following the 