ABC's Nightline, which had developed a reputation over the years for breaking more important news stories than any other nightly news program, is planning to air an exclusive interview tonight (Monday) with an American soldier who charges that his command gave orders to kill all military-aged males encountered and that U.S. military units compete with each other on "kill rates." The soldier, PFC Corey Clagett, has been charged along with three other soldiers of murdering prisoners in Iraq. He was interviewed in Kuwait by Nightline co-anchor Martin Bashir.