In April 2012, Chief of Naval Operations Greenert said, "You won't send it into an anti-access area," rather groups of two or three ships are intended to be sent into areas where access is jeopardized to perform missions like minesweeping while under the cover of a destroyer. The LCS main purpose is to take up operations such as patrolling, port visits, anti-piracy, and partnership-building exercises to free up high-end surface combatants for increased combat availability. Navy Secretary Ray Mabus clarified that the ship could operate in combat areas while under the protection of other warships. The LCS' utility against high-tech enemies would be when working with and being covered by destroyers, like they do with aircraft carriers. With destroyers providing extended air and missile defense, the cheaper (one-fourth the cost of a destroyer) and more numerous LCS can sweep for mines and deploy more sophisticated submarine detecting sonar. Following the decision to arm the LCS with anti-ship missiles, Navy wargames showed the adversary's risk calculus was radically changed, devoting more reconnaissance assets to trying to locate the smaller ships and sustaining heavier losses.