The Nabucco pipeline, scheduled to start construction in 2010, would ship gas from the Caspian region and the Middle East.
Israel and the US don't want rebuilding homes to become rebuilding Hamas.
Officials have pledged to rebuild the coastal enclave.
In Northern Ireland, he 'failed' 700 times but ultimately secured a deal in 1998 after decades of hatred and violence.
On Thursday he named George Mitchell as a special envoy, and he has already signaled that the US will reengage the region.