UPDATED DATE AND TIME

General Clark will appear on a Charlie Gibson Special, Friday, July 24, 2009 @ 10 PM EDT / 9 PM CDT
10:00 PM EDT | 9:00 PM CDT

Due to President Obama's press conference, the ABC News special "Over a Barrel: The Truth about Oil," originally scheduled to air on Wednesday, July 22 at 10:00 p.m., ET/PT will now air as a special edition of "20/20" on Friday July 24 at 10:00 p.m., ET/PT.

A SPECIAL EDITION OF "20/20" -- "OVER A BARREL: THE TRUTH ABOUT OIL"

ABC News Special Reported by Charlie Gibson to Air Friday, July 24 at 10:00 p.m., ET

More details available here: http://www.abcmedianet.com/web/dnr/dispDNR.aspx?id=072009_20