Three US oil firms return to Libya after 20 years  Three US oil
companies are to return to their oil and gas operations in Libya
after 20 years. Marathon Oil, ConocoPhillips and Amerada Hess
have signed a deal with Libya to return to fields they abandoned
in 1986.  The three companies gave up their interests when the
US government imposed sanctions on Libya after the Lockerbie
bombing in Scotland in 1988.  Libyan National Oil Corporation,
which has operated the three's concessions since they quit, will
hold nearly 60% of a new oil venture. The companies have agreed
to pay $1.3bn (£760m) to return and have their licences extended
to 2034.