Task: Evaluate the valence intensity of the snippet, providing a numerical assessment from 0 (very negative) to 1 (very positive), indicating the emotional orientation expressed.
Snippet: A House subcommittee listened as Mr. Truitt testified that the Navy's conclusion that another gunner, Clayton Hartwig, caused an explosion on the battleship Iowa was ''a big cover-up'' of the ship's safety lapses.
Intensity score: 