This letter comments on Cummings et al.’s case-control study finding that access to a firearm is associated with increased risk of suicide & homicide. Kellermann agrees with the findings, noting that a gun is more likely to be involved in a suicide, assault, or accidental shooting rather than repelling an intruder. He draws a comparison between gun industry claims that guns help homeowners feel safe, and the tobacco industry’s claims of smoking’s health benefits. (59 refs.)