New Photo To me - Great Presidential Protection by the Secret Service et al.

[Tracy Riddle]

There definitely was security stripping in Dallas, but we need to forget the idea that the SS secured every elevated position, every open window.

Here's Nixon in Cairo (!) in 1974:
[URL="http://www.corbisimages.com/images/Corbis-WL008479.jpg?size=67&uid=f50c370d-d673-49a5-a9d5-ea28d428ebc6"]http://www.corbisimages.com/images/Corbis-WL008479.jpg?size=67&uid=f50c370d-d673-49a5-a9d5-ea28d428ebc6

[/URL][URL="http://upload.wikimedia.org/wikipedia/commons/c/c9/President%27s_Trip_to_Europe-_Motorcade_in_Dublin._President_Kennedy,_motorcade,_spectators._Dublin,_Ireland_-_NARA_-_194227.jpg"]http://upload.wikimedia.org/wikipedia/commons/c/c9/President%27s_Trip_to_Europe-_Motorcade_in_Dublin._President_Kennedy,_motorcade,_spectators._Dublin,_Ireland_-_NARA_-_194227.jpg

[/URL][URL="http://www.libraries.wright.edu/special/ddn_archive/wp-content/gallery/truman_1/truman_motorcade.jpg"]http://www.libraries.wright.edu/special/ddn_archive/wp-content/gallery/truman_1/truman_motorcade.jpg

[/URL][URL="http://www.corbisimages.com/images/Corbis-U1572498.jpg?size=67&uid=b9d6a3b2-763d-4997-8621-01c410581c3d"]http://www.corbisimages.com/images/Corbis-U1572498.jpg?size=67&uid=b9d6a3b2-763d-4997-8621-01c410581c3d
[/URL][/url][URL="http://upload.wikimedia.org/wikipedia/commons/c/c9/President%27s_Trip_to_Europe-_Motorcade_in_Dublin._President_Kennedy,_motorcade,_spectators._Dublin,_Ireland_-_NARA_-_194227.jpg"]