Residents of an Orlando neighborhood of $500,000 homes are stepping gingerly these days since finding live World War II explosives next to a middle school, a day care center, homes and businesses.

"We are stressing what we call the three Rs," said Nancy Sticht, a spokeswoman for the U.S. Army Corps of Engineers, which she said means to recognize, retreat and report suspected bombs. "They're old but being old doesn't make them any less dangerous. They can become more unstable over time."