World News Tonight Preview

April 23 -- Good afternoon.

There was a shift today in U.S. policy regarding the handover of sovereignty to Iraq, which is slated to happen on June 30. Previously the Bush administration had insisted that June 30 would mark a transfer of full sovereignty; top administration officials now say the new government will face limitations in its ability to command a military and to enact new laws. Terry Moran has the latest on plans for the handover, which is now only 10 weeks away.

Also tonight, an act that exemplified sacrifice and commitment to one's country comes to a devastating end. Pat Tillman, former defensive back for the Arizona Cardinals, gave up a lucrative career in professional football in order to serve as a U.S. Army Ranger following the 9/11 terrorist attacks. Tillman was killed in action on Thursday during an ambush on the 75th Ranger Regiment in Afghanistan. Peter Jennings reports on the athlete who so quietly was willing to fight and die in defense of freedom.http://abcnews.go.com/sections/US/Sports/tillman_afghanistan040423-1.html

Advocates for retirees fear that under a new proposal, those who qualify for Medicare could see fewer health benefits in the future. The Equal Employment Opportunity Commission approved a proposal on Thursday that would allow employers to cut or eliminate health benefits altogether for retirees when they become eligible for Medicare at the age of 65. AARP, which represents millions of Americans, has strongly objected the ruling. Dean Reynolds reports tonight on the future of health benefits for America's elderly.

Finally tonight, we'll have our Person of the Week.

We hope you'll join us.