Thanks for asking. I'm okay. I was working from home all day and found out about the explosions through an email from management-- all it said was that anybody who needed to try contacting relatives in the Marathon could do so. For a few seconds I just thought that it was an odd message, then I thought, "Oh, fuck," and turned on the TV.
I don't know anybody who was running this year. At least I'm pretty sure I don't.