From Mars to Norfolk: NASA technology could serve on the high seas

To improve maritime security, the American military might take its cue from the Mars Rover.But unlike NASA's workmanlike retriever, the Navy wants a guard dog that can approach pirates and drug runners with an attitude.And on Thursday, a version of it was prowling the waters off Naval Station Norfolk.It is one of more than 90 technologies included in a grand-scale sea experiment known as Trident