So cool: My wife, Elaine Cushman Carroll, is part of official Twitter history. Her call to the Boston Globe led to the first tweet on the Boston Marathon bombing two years ago. That tweet was picked as a “landmark moment” and mentioned among 10 other major tweets by Twitter over its nine-year history. Search for “marathon”; she is the quoted witness. She is a credit to journalism and is a correspondent for the Globe. Thanks to Martin Finucane of the Globe for pointing this out. And another footnote to history: Martin sent the tweet.