Although the nightly competition between Charles Gibson and Brian Williams is quite tight, the two journalists - along with Katie Couric - combined forces today to promote a joint project. In a rare event, the trio hit all three morning shows to deliver the special news. This meant a return to old stomping grounds for both Couric (Today) and Gibson (Good Morning America).

Together they announced that ABC, NBC and CBS will be simultaneously devoting one hour to the same cause: the fight against cancer. Stand Up 2 Cancer, a commercial-free telethon airing September 5th, will aim to raise funds for research.

The disease, which reportedly kills 1,500 Americans every day, is something that has most likely touched everyone out there…and these three anchors are not immune. While most people remember Katie’s husband dying of colon cancer in 1998, Brian Williams has also lost a sister to breast cancer. In addition to knowing members of his family with the illness, several of Gibson’s co-workers have waged a public battle with the illness: Peter Jennings (who died in 2005 from lung cancer), Joel Siegel (who passed away last year from colon cancer) and Robin Roberts (who was diagnosed in 2007 with breast cancer).

More information on the event can be found here.