Frontline, the WGBH/PBS investigative news show, will air “Top Secret America” After the Boston Bombings tonight on PBS stations. Local station listings can be found here.

Have the hundreds of billions of dollars spent since Sept. 11 on counterterrorism efforts in America made us safer?

In response to the recent terrorist bombings in Boston, FRONTLINE will take a definitive look at that timely, urgent question next Tuesday, April 30, in Top Secret America – 9/11 to the Boston Bombings, an updated version of our film which originally aired in September 2011. Pulitzer Prize-winning reporter Dana Priest traces the journey from 9/11 to the marathon bombings, examines efforts to improve information sharing among federal agencies tasked with keeping us safe and investigates the secret history of the 12-year battle against terrorism.