Fair enough. But factual issues aside, stating that nobody attacks ground-based transit systems weakens that point rather than strengthening it. If you want t

Fair enough. But factual issues aside, stating that nobody attacks ground-based transit systems weakens that point rather than strengthening it. If you want to argue that near-complete security is infeasible, you're probably better served by acknowledging that attacks on something as pervasive and porous as a bus system are a real possibility. So that's why I thought it was necessary to challenge you on that point.