How many Americans, a year, die from acts of terrorism? Well, if you limit it to US soil, just a few people, since 2001. (Worldwide, excluding soldiers in combat, you might rise to 10 a year. Maybe.)
What is the US government doing about it? Well, it started at least one unnecessary war, got 3000 US soliders killed, ripped the Constitution to shreds, and has driven the budget deficit to record levels.
How many Americans, a year, die in truck-related accidents? About 5000 a year.
What is the US government doing about it? Weakening safety regulations.