Details are slowly emerging from the terror strike at the finish line of the Boston Marathon. President Obama officially called it an act of terrorism. Officials released the first photos of one of the bombs, which were made with pressure cookers. A Boston television station found before and after pictures that appear to show the duffel bag which likely contained one of the bombs. Investigators, however, have revealed that the trail has gone cold. “The range of suspects and motives remains wide open,” said an FBI investigator.

The Free Beacon reports that feds are probing potential links to al-Qaeda, and quotes from an al-Qaeda training article on how to “Make A Bomb in the Kitchen of Your Mom” that is undetectable to trained dogs. Eight months ago, Eli Lake warned of this kind of attack last summer in an article for the DailyBeast, quoting a top general who said that roadside IEDs could soon come to the United States because they are simple, low-tech and made of readily-available components.

Finally, the National Journal opines on why Boston might be scarier than 9/11.