Galvanic corrosion is a process that degrades metals electrochemically. This corrosion occurs when two dissimilar metals are located in contact with each other in the presence of an electrolyte, such as salt water, forming a galvanic cell.
But the memories of that tragic day 25 years ago are still vivid to many in Edmond. On Aug. 20, 1986, gunman Patrick Henry Sherrill shot and killed 14 co-workers, wounded six and then took his own life inside the post office where he worked.
The United States Secret Service published a study regarding 37 school shooting incidents in the United States from 1974 through June 2000, which warned against the belief that a certain type of student would be a perpetrator. According to the study, any profile could apply to any student and might not apply to a potential perpetrator.