“A pressure cooker stuffed with gunpowder and shrapnel caused at least one of the blasts at the Boston Marathon that killed three people and injured 176 others in the worst attack on U.S. soil since Sept. 11, 2001,” chicagotribune.com reports. The trib attributes the info to “law enforcement” sources, confirming suspicions raised by the blast’s bright flash and smoke cloud. Sadly, our man Leghorn called this one minutes after the explosion. Sad because Nick raised the possibility that a gunpowder-based bomb could lead to legislation restricting gun owners’ access to gunpowder and other reloading components. Even the most skeptical among us must now realize that “common sense” gunpowder control doesn’t seem as far-fetched as it did just twenty-four hours ago.