Mr. YOUNGBLOOD. Well, it is a picture showing the main street, Houston Street and Elm Street, and the assassination occurred on Elm Street. Mr. SPECTER. Are you familiar at this time with the identities of Main, Houston, and Elm? Mr. YOUNGBLOOD. Yes, sir; when I have a map such as this ahead of me. Mr. SPECTER. All right. How far behind the President's automobile was the Vice President's automobile in which you were riding when the Vice President's automobile turned right off of Main Street onto Houston? Mr. YOUNGBLOOD. You ask again how far were we behind the President's car? Did you mean, sir, how far were we behind the Presidential followup car? Mr. SPECTER. No; I meant the President's car on that occasion. Mr. YOUNGBLOOD. Well, we were a distance of about two car lengths behind the followup car, and they were probably one car length behind the Presidential car. But this would be a guess on my part. Mr. SPECTER. What was the situation with respect to the crowd which was lined up on Houston and Elm as you approached that intersection? Mr. YOUNGBLOOD. On Houston Street, on the side where the tall building is, the crowd was still somewhat continuous. On the side which is the park side, the crowd was smaller. They did have some people there, but it wasn't continuous in the same way it was on the building side. Mr. SPECTER. What is your best estimate of the speed of the Vice President's car as you proceeded down Houston Street toward Elm Street? Mr. YOUNGBLOOD. Well, our speed, of course, was governed by the vehicles in front of us, but I would say we had just made one turn, and it was only a block there before we would make another turn. It was approximately 10 miles an hour, between 10 and 15. Mr. SPECTER. I show you a photograph which has been marked as Commission Exhibit No. 348, and I ask you if you are now able to identify what that building is? Mr. YOUNGBLOOD. Yes, sir; I am now able to identify it. Mr. SPECTER. What is that building, sir? Mr. YOUNGBLOOD. That is the School Book Depository Building. Mr. SPECTER. Where, as best you can recollect, was the Vice President's car at the time the first shots were heard? And would you take Commission Exhibit No. 354 and take the red pencil and mark as closely as you can the exact position on Commission Exhibit 354 of the Vice President's car with the capital letter "A" there? Mr. YOUNGBLOOD. At the time of the first shot, did you say? Mr. SPECTER. Yes, sir. Mr. YOUNGBLOOD. It will be in this area here, I should think. Mr. SPECTER. I want the Vice President's car at this time. Mr. YOUNGBLOOD. Well, this is what I am attempting to locate. It would be in the vicinity of this "X" right here, I do believe. Mr. SPECTER. All right. Now, will you describe---- Mr. YOUNGBLOOD. Excuse me. You said put an "A" here? Mr. SPECTER. Yes, please. Will you describe just what occurred as the motorcade proceeded past the intersection of Houston and Elm Streets?