Very busy news day here at The Last Word. Officials in Boston told reporters they've identified "a number of people" from video footage taken near the blast site and have "solid leads" in the case.
Once again, msnbc's Lawrence O'Donnell will be anchoring the show live from Boston. Here's a look at the stories shaping tonight's rundown:
- Investigators in Boston bombing have a ‘face, not a name’
- What we know: Inside the Boston bombs
- Anatomy of a bombing: Photos show battery, wires used in device
- Wave of suspicious letters sent to Obama, Congress
- Senate to vote Wednesday on gun control
- NRA ad: Listen to Police on guns, not Obama and Bloomberg
- Republicans pull plug on Mark Sanford
- Sanford responds to trespassing charge