Keith Cowing runs Nasawatch.com, and he used to be a biologist at NASA. Welcome to the program.

NPR: Is the Space Shuttle Worth the Effort?

Declan, welcome to the program and what about this operation?

NPR: Afghanistan Update: New Offensive Targets Taliban

Mr. de los Santos, welcome to the program.

NPR: Freddie Mac Good For Business, Bad For Homeowners?

And Matthew Dowd, welcome to the program.

NPR: In a Crowded Political Field, How to Get Noticed?

Welcome to the program once again, Senator.

NPR: Bush Lacks a Clear Plan on Iraq, Democrat Says

Mike Woolston, welcome to the program.

NPR: Two Years Later, Joplin Mayor Reflects On Impact Of Tornado

Welcome to the program, Gary Snyder.

NPR: Birth of the Beat Generation: 50 Years of 'Howl'

Welcome to the program, Ms. Murray.

NPR: Ethical Balance of Adopting a 'Snowflake' Embryo

Welcome to the program, Professor Blakely.

NPR: Rebuilding-Project Scholar Picked for New Orleans Job

Gary Sick, welcome to the program.

NPR: Ahmadinejad's Role in Iran Hostage Crisis Disputed

Welcome to the program, Dr. Thommes.

NPR: What Makes Our Solar System Special?

Welcome to the program, Dr. Schawinski.

NPR: What Makes Our Solar System Special?

Welcome to the program, Scott Warmuth.

NPR: Namecheck: Did Timrod Influence Dylan?

Welcome to the program, Mr. Roberts.

NPR: Gulf Oil Discovery Could Have Far-Reaching Effect

Welcome to the program, Chief Curran.

NPR: Examining Protocol In Disorderly Conduct Cases

Ranald MacDonald, welcome to the program.

NPR: Chirac Comments Spark Flap over British Food

Welcome to the program, Director Sykes.

NPR: Astronomers Prepare to Fight Pluto Demotion

Welcome to the program once again.

NPR: Snowe Looks for Bipartisan Support on Iraq Bill

Welcome to the program, Ms. Simer.

NPR: A Military Spouse's Reaction to House Bill

Welcome to the program, Mr. Gross.

NPR: Who Is Henry Paulson?

Welcome to the program, Sarah.

NPR: Detroit Feels Pain Of Big Three's Troubles

Elizabeth, welcome to the program.

NPR: Poverty, Still Coming To A Suburb Near You

Welcome to the program, Senator.

NPR: Leahy Vows to Unveil Events that Led to Firings

Welcome to the program, Melissa.

NPR: How To Survive In This Economy

Welcome to the program, sir.

NPR: Obama To Name Supreme Court Nominee

Jim, welcome to the program.

NPR: Paper Slams Feds for Response to 'The Big One'

Welcome to the program, David.

NPR: Iraq Recommendations: Diplomacy with Iran, Syria

And welcome back to the program, Syd.

NPR: Slate's Medical Examiner: Doubts on Supplements

David Frum, welcome back to the program.

NPR: Former Bush Speechwriter Reviews Iraq Address

Welcome back to the program, Dr. Trenberth.

NPR: Can Climate Change Explain Odd Weather?