Text from DailyMail:
The image of a smiling and waving 
John F Kennedy in his presidential limousine moments before he was 
assassinated is burned into the national consciousness.
We
 all know the outcome of that tragedy, but one of the key pieces of 
evidence from the day - the Lincoln limousine - went on to serve four 
more presidents before it was finally retired in 1977. 
The car draws crowds at the Henry Ford Museum in Dearborn, Michigan, where it ended its long journey.
Historic artifact: The Kennedy Presidential limo is now drawing crowds at the Henry Ford Museum
 
Before the storm: The presidential limousine carries President John F and Jackie Kennedy through the streets of Dallas
 
When President John F 
Kennedy was assassinated in 1963, he was riding in a motorcade through 
Dallas in the 1961 Lincoln Continental four-door convertible. Completely
 open at the top, the car, code-named X-100, had no armor or 
bullet-proof elements whatsoever, a fact incomprehensible today. The tires were not bulletproof.
 There was no bulletproof glass. It did have a removable plastic top, 
but, again, it was just Plexiglas,' Matt Anderson, curator at the Henry 
Ford Museum, told CBS.
'It
 was no, no bullet resistance in that material. It's amazing to think of
 it, but they just didn't anticipate that kind of problem.' 
The custom-built car 
cost $200,000 and had features including retractable steps for Secret 
Service agents and two radio telephones.Following
 Kennedy's assassination, the car was driven directly back to the White 
House so it could be examined as part of the investigation.'They
 determined that the most practical thing to do was just to rebuild this
 existing car rather than to start from scratch, so, yes, they took the 
car down to the frame and rebuilt it as a true armored vehicle,' 
Anderson told CBS. 'The 
biggest change they made in modifying the car was putting in a permanent
 roof that could not be removed, and they surrounded the whole vehicle 
with bullet-resistant glass.' 
It
 was completely armored, a top was added and it was given a paint-job in
 'regal Presidential Blue Metallic with silver metallic flakes that 
glitter under bright lights and sunshine.'
Lyndon
 Johnson was two cars behind Kennedy the day of the assassination. After
 he was sworn in as president, he occasionally had to ride in the car.  According to Anderson, he disliked the blue paint job the car had been given because it was too similar to the original color.  It was promptly painted black, but Johnson was never comfortable riding in the car and avoided it whenever possible. When
 President Nixon had use of the car, he had a hole cut in the roof as a 
hatch, so that he could stand up and wave at crowds.  Presidents
 Ford and Carter also used the car, until it finally reached the end of 
the road and came to a stop at the Henry Ford Museum. 
Cuando el presidente John
 F 
Kennedy fue asesinado en 1963, circulaba en una comitiva de vehiculos en
 Dallas a bordo de un Lincoln Continental descapotable de 4 puertas.
Totalmente
 descubierto, el coche, cuyo codigo interno era X-100, no estaba 
blindado ni tenia ningun elemento de protecion antibalas, algo 
incompresible hoy en día.
Los
 neumaticos no eran antibalas, ni tampoco los cristales. Tenia una 
cubierta desmontable de plastico pero, de nuevo, no era antibalas. Es dificil de comprender, pero ellos no anticiparon este problema.
Los
 trabajos de personalizacion del coche costaros 200.000 Dolares, 
incluyendo los reposapies retractiles para el servicio secreto y dos 
radio-telefonos. Después del asesinato de Kennedy el coche se condujo a 
la Casa Blanca para ser examinado como parte de la investigacion. Se 
determino que lo mas conveniente era reconstruir el coche, asi que se 
elimino la carroceria y se construyo como un nuevo coche blindado. El 
cambio mas significatvo fue instalar un techo no desmontable con vidrio a
 prueba de balas. El coche se blindo totalmente  y se pinto con un color
 azul metalizado "presidencial" con reflejos metalizados que brillaban 
bajo la luz.
Lyndon
 Johnson viajaba dos coches por detras el dia del asesinato de Kennedy. 
Después de su toma de posesion el tuvo que viajar en el coche 
ocasionalmente. No le gustaba el nuevo color azul porque se parecia 
demasiado al color original del coche de Kennedy. Se pinto de negro, pero Johnson nunca viajo cómodo en ese coche, y trataba de evitarlo.
Cuando El presidente Nixon tuvo que usar el coche, se le hizo un agujero en el techo a modo de una escotilla para que pudiera saludar a la multitud.
Los presidentes Ford y Carter tambien usaron el coche, hasta que finalmente llego al final de su camino cuando se instalo en el Museo Henry Ford en el año 1977
President Lyndon Johnson 
Actor John Wayne campaigns with 
President Gerald Ford in the Presidential limo in 1976, the year before 
the car was retired from the Presidential fleet
Unforgettable: Despite 50 years passing since 
Kennedy's death, the tragic day remains fresh in the collective 
consciousness of Americans