Colonoscopy is the endoscopic examination of the large bowel and the distal part of the small bowel with a CCD camera or a fiber optic camera on a flexible tube passed through the anus. It may provide a visual diagnosis (e.g. ulceration, polyps) and grants the opportunity for biopsy or removal of suspected lesions.

Colonoscopy can remove polyps as small as one millimetre or less. Once polyps are removed, they can be studied with the aid of a microscope to determine if they are precancerous or not.

Colonoscopy is similar to, but not the same as, sigmoidoscopy—the difference being related to which parts of the colon each can examine. A colonoscopy allows an examination of the entire colon (measuring four to five feet in length). A sigmoidoscopy allows an examination of the distal portion (final two feet) of the colon, which may be sufficient because benefits to colonoscopy (cancer survival) have been limited to the distal portion of the colon.

The American Cancer Society “Guidelines for the Early Detection of Cancer” recommend, beginning at age 50, both men and women follow one of these testing schedules for screening to find colon polyps and cancer: 1. Flexible sigmoidoscopy every 5 years, or 2. Colonoscopy every 10 years, or 3. Double-contrast barium enema every 5 years, or 4. CT colonography (virtual colonoscopy) every 5 years.

Katherine Anne "Katie" Couric (born January 7, 1957) is an American journalist and author. She serves as special correspondent for ABC News, contributing to ABC World News, Nightline, 20/20, Good Morning America, This Week and primetime news specials. Starting on September 6, 2012, she will host Katie, a syndicated daytime talk show produced by Disney-ABC Domestic Television. She has anchored the CBS Evening News, reported for 60 Minutes, and hosted Today and reported for Dateline NBC. She was the first solo female anchor of a weekday evening news program on one of the three traditional USA broadcast networks. Couric's first book, The Best Advice I Ever Got: Lessons from Extraordinary Lives was a New York Times best-seller.

As of May 2012, Couric also has a web show for ABC News, entitled Katie's Take, airing weekly on Yahoo.

Couric was born in Arlington, Virginia, the daughter of Elinor Tullie (née Hene), a homemaker and part-time writer, and John Martin Couric Jr., a public relations executive and news editor at The Atlanta Journal-Constitution and the United Press in Washington, D.C. Her mother was Jewish, but Couric was raised Presbyterian. Couric's maternal grandparents, Bert Hene and Clara L. Froshin, were the children of Jewish immigrants from Germany. In a report for Today, she traced her paternal ancestry back to a French orphan who immigrated to the U.S. in the nineteenth century and became a broker in the cotton business.

William Ray "Bill" Engvall, Jr. (born July 27, 1957) is an American comedian and actor best known for his work as a stand-up comic and as a member of the Blue Collar Comedy group.

Bill Engvall was born in Galveston, Texas. Following graduation from Richardson High School in Richardson, Texas, Engvall attended Southwestern University in Georgetown, Texas, intending to earn a Bachelors degree and become a teacher. While at Southwestern he was a member of Xi Chapter of the Kappa Alpha Order. Engvall left college prior to earning his degree and worked a series of jobs, including tour guide at Inner Space Caverns, and disc jockey in a Dallas, Texas nightclub. It was while working as club DJ he first ventured into standup comedy at amateur and open mic nights around Dallas.