PORTLAND, Maine (AP) – Federal prosecutors are recommending that a young New Hampshire man be sentenced to nearly 20 years in prison for setting fire to a nuclear-powered submarine docked in Maine, causing an estimated $450 million in damage, but his defense attorney is asking that the sentence be less than 16 years.

In a sentencing memorandum filed Friday in U.S. District Court, the U.S. attorney’s office recommended the top of the sentencing range allowed under an agreement in which Casey James Fury pleaded guilty to setting fire to the USS Miami.