Terror and its costs
From CNN's Tom Foreman in Washington:
WASHINGTON (CNN) -- A new FBI warning for people to watch out for suicide bombers has the public hearing a lot of scary talk.
"In this day and age, there is no public official or government office that wants to get caught in the situation that, following a terrorists attack, it is found out that they didn't tell folks they were supposed to tell about it. So what we have is a flood of information. Every little scrap of into that suggests there might be a threat is put out there and I think that is a mistake," says international security expert Jim Walsh.
There are financial costs to the fear.
The New York transit authority says it's considering banning almost all photography on subways, buses and trains to keep terrorists from gathering information about potential targets.
The Department of Homeland Security says it wants new security measures for railways, including the installation of see-through trash cans which make it harder to hide bombs.
Amtrak says replacing all of its trash cans could cost a half-million dollars.
And there is the mental cost.
"You cannot, it seems to me, keep a civil population or any military unit in a constant state of heightened readiness before that unit or that population simply turns itself off," says retired Army Lt. Gen. Dan Christman.