NEWPORT, R.I. (Sept. 19, 2018) Colombian navy Vice Adm. Gabriel Perez speaks with retired Colombian navy Adm. Guillermo E. Barrera, a U.S. Naval War College (NWC) professor and distinguished international fellow during the Chief of Naval Operations' 23rd International Seapower Symposium (ISS) at NWC. More than 180 senior officers and civilians from more than 100 countries including many of the senior-most officers from those countries' navies and coast guards, are attending the biennial event Sept. 18-21. This year's theme is "Security, Order, Prosperity," and will feature guest speakers and panel discussions to explore the common security challenges of maritime nations. First held in 1969, ISS has become the largest gathering of maritime leaders in history and provides a forum for senior international leaders to create and solidify solutions to shared challenges and threats in ways that are in the interests of individual nations.