World News Tonight Preview

June 29 -- Good afternoon.

On the first full day after the handover of power, Iraq's interim Prime Minister Iyad Allawi announced that the most notable prisoner of war will be handed over to the newly sovereign government. Saddam Hussein and several others connected to his ousted regime will be placed in the legal custody of the Iraqis on Wednesday. The physical removal of Saddam from U.S. custody, however, will not take place until at least Thursday. At a news conference today, Allawi reassured Iraqis that Saddam will be held responsible for the atrocities committed when he was dictator, though it will be several months before a trial can take place. Peter Jennings reports from Baghdad tonight on the day's developments.http://abcnews.go.com/wire/World/ap20040629_943.html

Also, we'll have a report from Sadr City, a slum in eastern Baghdad that has been the site of fierce clashes in recent months between U.S. forces and Medhi Army militiamen loyal to Shiite cleric Moqtada al-Sadr, an opponent of U.S. presence in Iraq. Jim Sciutto talks to Brig. Gen. Jeffery Hammond, the commander of the 1st Cavalry Division that has been working with his soldiers to win over the hearts and minds of the people in Sadr City.

In medical news, there's new evidence out today that the harmful effects of second-hand smoke may be much greater than previously thought. A study, published in the British Medical Journal, finds that breathing in smoke from someone else's cigarettes could increase one's risk of heart disease by up to 60 percent, compared to the 25 percent reported in the past. Evidence for the study was collected by measuring smoke by-products found in the blood of some 2,000 non-smokers over a 20-year period. John McKenzie reports tonight on the study and its implications on public health.

And finally, an early look at one of the largest American embassies in the world: the new embassy in Iraq. U.S. Ambassador to Iraq John Negroponte arrived in the country on Monday to begin work at the embassy which will employ some 3,000 workers. Peter Jennings has taken a tour of the facilities in Baghdad and reports tonight on the challenges that lie ahead for the American diplomats working there.http://www.abcnews.go.com/sections/world/dailynews/IraqIndex.html