Cincinnati high school students erected a mini-cemetery as a memorial to the US soldiers killed fighting in Iraq. A dozen students at Walnut Hills High School erected 974 putty-and-wood pieces made to look like gravestones at the school's front entrance early yesterday. One of the students, Traven La Botz, said the display received mixed reactions, with some passers-by thanking the students and others yelling at them. The students call themselves the "Concerned Students for Peace." The principal of Walnut Hills High Marvin Koenig called it a dramatic protest, but said the students would have to remove the display and return the lawn to its prior appearance. School officials said that was done this morning.