The NIAMS was joined by the CDC, the Mayo Clinic, the AF and the ACR to answer questions tweeted from the public with the hashtag #NewsHourChat. NCCIH also participated by posting tweets about complementary and alternative approaches to treating arthritis. The chat “trended” on Twitter, becoming one of the most popular conversations at the time. The 1,133 tweets in the chat, posted by 220 participants, were viewed more than 53 million times by Twitter users. NIAMS was listed as one of the top influencers in the chat. The chat is archived at http://www.pbs.org/newshour/rundown/twitter-chat-ask-your-arthritis-questions/.