As the world's largest library, the Library of Congress ranks among most genealogists' dream research institutions. Whether you've had the chance to visit in person or online, you may have some burning questions for one of the library's reference specialists. Now is your chance to ask.

In a new program called "Ask a Librarian," librarians in selected Library of Congress reading rooms (including the Local History and Genealogy department) will conduct live online chats each weekday from 2 to 3 p.m. (EST).