Vintage photos show how presidential limousines have changed, from open convertibles to Biden's $1.5 million armored Cadillac known as 'The Beast'

• US presidents used to ride in unarmored convertibles with open roofs.
• After John F. Kennedy's assassination, presidential cars were customized with safety features.
• Today's presidential limousine is a 20,000-pound, $1.5 million Cadillac known as "The Beast."

US presidents used to ride around in open convertibles. Today, President Joe Biden is driven in a 20,000-pound, $1.5 million armored Cadillac known as "The Beast."

Take a look at how presidential limousines have changed through the years.