EDMOND, Okla. (AP) — David McIlhatton knows terrorism cannot be prevented. But measures to keep people safe often deter people from visiting sites or cities.

"We don't want a strong physical (security) presence because that doesn't do anything to engage investment," he told The Jouranl Record (http://bit.ly/2p6x9Lz ).

McIlhatton studies terrorism and its societal influence at Coventry University in England. He and University of Central Oklahoma real estate professor David Chapman are working on a study about terrorism and the built environment.

Their work started last fall. McIlhatton gave an...