The first ever "tweetathon" is happening from noon to 1 p.m. Central time today.

ABC's Chief Health and Medical Expert, Dr. Richard Besser is spearheading the project online.  For every tweet put out with the hashtag #abcDRBchat, ABC will donate $1, up to $10,000.

Meanwhile, Dr. Besser is tweeting out facts about hunger in the U.S., with the aim of raising awareness and money for food banks.