The GAO has issued rail security recommendations since at least 2004-2005.
What have opportunist Dems like Sen. Schumer — and what has the Obama administration — done on rail security since then?
And flashback to 2004, at Barcepundit on the Madrid bombing:
You can see the three blasts (the third one is specially big). Later, while police and paramedics where assisting the wounded, there was an alert because somebody thought that another artifact was going to blow up (something that in the end didn't happen, fortunately).