Dan Cohen AUTHOR Spikes now being installed on the White House fence to enhance security were manufactured at Rock Island Arsenal’s Joint Manufacturing and Technology Center.The “removable anti-climb feature consisting of sharp metal points” was designed by the U.S. Secret Service. Rock Island Arsenal, located on the Mississippi River between Iowa and Illinois, is the Army’s only full-scale metal manufacturer. Personnel from the Joint Manufacturing and Technology Center began helping to install the spikes last week. The work should be finished next month.The security enhancements are intended only as a temporary measure; the Secret Service and the National Park Service are developing a long-term design solution. The modifications are a response to an incident last year in which a man carrying a knife scaled the White House fence, ran across the North Lawn and entered the residence before being tackled by a Secret Service officer.To see the fencing being installed, watch a video from the Washington Post.