It's too soon to tell what the hell is happening at the Boston Marathon — Reuters has a live blog for breaking news — but you can discuss the explosions down below. If you're in the area, please stay safe.
If you know someone running in the Boston Marathon, you can check their last location here.
Gawker is updating here; Deadspin has info here. We'll have a an updated post going up later.
Image via Best Earth Pics Twitter