Please Explain is all about America's favorite sandwich - the hamburger! Find out how German hamburg steak became a classic meal all over the world. We'll also hear about the best burgers available, from fast food versions to grass-fed beef on brioche buns. George Motz has been called America's foremost hamburger expert; his 2005 documentary film is "Hamburger America"; he's also written a book called Hamburger America: One Man's Cross-Country Odyssey to Find the Best Burgers in the Nation. Josh Ozersky is the author of The Hamburger: A History.

Weigh in: Tell us about your ideal hamburger. What kind of bun, meat, and toppings do you love?