An Anne Arundel County man was arrested yesterday after calling 911 and threatening more explosions in Boston.

Logan Circle resident Lauren Gabler didn’t have a great race, but whatever disappointment she harbored was quickly brushed aside by the chaos, confusion and concern after two explosions went off near the finishing stretch of the Boston Marathon.

Not a day after construction workers found an unexploded 1,000-pound military ordnance at a site of a mixed-use development near Nats Park, a cache of smaller shells and bombs were found today.

We’ve been following the case of Collin McKenzie-Gude, 18, of Bethesda since his arrest last week on charges of making and exploding pipe bombs and illegally possessing firearms. At first glance, the circumstantial evidence that’s been piling up paints a pretty weird picture. Here’s what’s happened so far: On Tuesday, July 29, Montgomery County investigators acted on a tip from a concerned citizen and searched the Gude family home on the 6300 block of Rockhurst…