So far, there has been virtually no visible progress in the Palestinian-Israeli peace process since the two sides relaunched it after the U.S.-hosted Mideast peace conference in late November.
On the Iranian nuclear file, Bush called for efforts from the Islamic world to stop Iran from acquiring a nuclear weapon, adding that, otherwise, it would be an "unforgivable betrayal of future generations."
Iran, however, has repeatedly denied seeking the atomic bomb, saying that its nuclear program is aimed solely at peaceful use to generate energy.
Bush, who arrived here on Saturday, also urged Mideast nations to isolate Iran and its closest regional ally Syria, as well as confront Palestinian Islamist group Hamas, which is listed by the United States and Europe as a terrorist group.
On the Lebanon issue, Bush called on Lebanon's neighbors and other nations in the Middle East to oppose the Shiite Islamic movement Hezbollah as rival Lebanese leaders were meeting in Qatarin a bid to resolve a protracted political crisis.
The crisis boiled to deadly clashes between government supporters and opponents earlier this month, leaving at least 72 people dead and about 200 others injured.
On the Iraq issue, Bush met here with Iraqi Vice President AdilAbd-al-Mahdi and deputy Prime Minister Barham Salih to express his concern on Iraq's reconstruction.
On Afghanistan, Bush urged other nations to help Afghanistan with its reconstruction and development at a donors' meeting in Paris slated for June.
Under the theme "Learning from the future", the three-day Forum will attract 1,500 people, including heads of state, business leaders and ministers from 55 countries.
Some hot topics, such as regional tourism, water resources, sustainable development in the region, soaring food prices and the consequences of global inflation on Mideast, will also be high on the agenda of the international meeting.
Before Egypt, Bush's five-day Mideast tour, the second one in 2008, took him to Israel and Saudi Arabia.
(Xinhua News Agency May 19, 2008)
