Media, political responses to Boston explosions

New York Times media reporter Brian Stelter has tweeted/retweeted some media-focused observations from today's events and breaking news events more generally. Here's one that's particularly interesting/relevant given class discussions:

Matt Lauer will be in Boston for @todayshow. Before the blasts Savannah Guthrie taped an Obama interview; now it'll seem somewhat outdated.
— Brian Stelter (@brianstelter) April 15, 2013

A tweet from a MA senate campaign also illustrates some political decisions campaigns make in response to news like this:

The Ed Markey for Senate campaign has suspended campaign activities including canvassing, phone banking, fundraising and television ads.
— Ed Markey (@EdMarkey) April 15, 2013

Finally, Slate posted an article on what journalists and politicians should avoid when tweeting about a crisis.