The aftermath of the shocking attack by Hamas and Palestinian militants on Israel and the response in Gaza are grim reminders of the dangers of terrorism on a large scale, and serves as an affirmation at home of the need for preparedness and public engagement. In the United States, which lost at least nine citizens in the Mideast violence, there is renewed concern about safety in various enclaves and in places of faith, where many will gather to mourn, pay respects, and pray. In the coming days, these places may be attractive targets for terrorists, underscoring the importance of increased…