Concerns over port security may be sky high, but the chief of security for the East Coast's main port operator, Peninsular & Oriental Steam Navigation Co., hardly knew it when he sat before a Senate Commerce panel on Tuesday. More than a dozen senators grilled U.S. government officials, and the chief operator officer of Dubai Ports World, which is on the verge of acquiring P&O and all its world-wide port operations. But no senator had a single question for Robert Scavone, the man who oversees P&O's security for North America -- and will do the same for DP World. Scavone...