The program is noted for the participation of its viewers who may call in, submit questions and comments via e-mail or, since March 5, 2009, Twitter. As facilitators of conversation between the public and C-SPAN guests, "Washington Journal" hosts do not offer their own perspective on issues, and leave more pointed questions to callers, though they will occasionally ask for clarifications from callers and guests. Consistent with its emphasis on reflecting a wide variety of viewpoints, C-SPAN aims to take approximately 60 calls in each program, and roughly 20,000 calls per year.