A bit crappy
"Friends and foes will be unable to tell initially whether a missile launch involves a conventional Tomahawk or a nuclear armed Trident"
What the fcuk? Tomahawk - cruise missile, bogglers along at low altitude leaving fairly small IR signature, travelling at just under Mach 1. Trident - SLBM, hurtles near vertically upwards into near-earth space on a ballistic trajectory producing all the IR signature imaginable. And the "similarities" only apply if they are tracking the submarine anyway!
D'you think they meant they would be unable to tell the difference between a TLAM-C and TLAM-N before it hit? Which is of course quite true.