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Vintage photos: How presidential limos evolved from open convertibles to Biden's armored Cadillac

President Ronald Reagan waves from the back of his limousine in 1984.Ronald Reagan Library/Getty Images 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. Presidential cars replaced horses and carriages in the early 20th century. President William McKinley rides in an automobile in 1896.Photo12/Universal Images Group via Getty Images President William McKinley, who served from 1897 to 1901, was the first US president to ride in a car, according to the National Archives. The administration of President Theodore Roosevelt, who succeeded McKinley after his 1901 assassination, was the first to include a government-owned car. In 1941, President Franklin D. Roosevelt became the first president to ride in an armored vehicle — a limousine that previously belonged to gangster Al Capone. President Franklin D. Roosevelt rides in a car with bulletproof glass in 1942.Bettmann/Contributor/Getty Images Roosevelt previously drove around in a 1936 Packard Touring Limousine. Then, in 1941, he upgraded to an automobile with bulletproof glass that the Treasury Department had seized from Capone in 1932, according to the US Secret Service. President Dwight Eisenhower's presidential limousine was a 1955 Chrysler Crown Imperial. President Dwight Eisenhower waves to cheering crowds in 1955.Bettmann/Contributor/Getty Images The car featured a 250-horsepower V8 engine and a sunroof, according to the US Secret Service. President John F. Kennedy's assassination in the back of a 1961 Lincoln Continental changed presidential cars forever. President John F. Kennedy, and first lady Jacqueline Kennedy ride through Dallas in 1963. Minutes later, Kennedy was assassinated as his car passed through Dealey Plaza.Bettmann/Contributor/Getty Images Kennedy's limousine included a hydraulic seat that could be raised 10.5 inches for a better view of the president, but no protective features. After Kennedy's assassination, presidential cars were customized to prioritize the safety of the commander-in-chief with thick layers of armor.

Cadillac Rear Camera Mirror | 2017 Autoblog Technology of the Year Finalist

We give Cadillac a lot of credit for being the first to make good on the promise to replace mirrors with cameras and displays. That was good enough to earn the Cadillac Rear Camera Mirror a place on our 2017 Technology of the Year awards shortlist for new features. The idea behind this system is relatively simple; what perhaps took more doing was getting the regulations in place to allow a video feed to replace the government-mandated mirror. The hardware and that rules compliance starts with what looks like a normal rearview mirror – because it defaults to being a mirror until you switch on the display or in the event the system somehow fails. Flip the little toggle at the bottom of the mirror – the one normally used to switch from day to night mode – and the reflection is replaced by a very crisp feed from a camera at the back of the vehicle. This live stream gives you a wide-angle view of what's behind, without obstruction from back-seat passengers, headrests, or any bodywork. The camera is even shielded from weather and has a coating to shed water. What you see doesn't exactly look like a normal reflection, but the quality is good enough and you see more than you would normally with something aimed through today's small rear windows. But because it isn't actually a reflection, you have to make some adjustments. When your eyes are focused down the road, glancing at a mirror gives you a view the same distance away but in the rear. With the rear camera mirror, a glance back requires your eyes to first refocus on the display, which takes a moment. And unlike a normal mirror, which you look through at an angle, this display is angled toward the driver but projecting an image that looks straight back – no matter how you move it, the image doesn't change like a mirror's would. And because it's an image and not a reflection, you can't choose what's in focus and lose your sense of depth perception. It's not clear whether objects in mirror are closer or farther than they appear. And there are other limitations. For instance, while the display balances bright lights and dark surroundings well at night, it is tricked by LED headlights, which flicker at a rate faster than the camera shoots. The result is a distracting strobe effect like you get when you point a smartphone camera at any LED light source. For those with migraine sensitivity, this kind of fast flashing can cause real problems.

2021 BMW M3/M4 and Volkswagen ID.4 revealed | Autoblog Podcast #646

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by West Coast Editor James Riswick. Together, they tackle a week's worth of big news, including the reveals of the BMW M3 and M4 and Volkswagen ID.4, as well as Tesla's Battery Day. Greg's been driving the long-term Subaru Forester, and gives us an update on that, while James discusses the current state and direction of Cadillac after driving the CT5. Then, the two dads talk about child seat safety, as well as random things they've learned from having children of their own. Autoblog Podcast #646 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown 2021 BMW M3 and M4 revealed with a standard manual and up to 503 horsepower 2021 Volkswagen ID.4 breaks cover with 250-mile range Why the Volkswagen ID.4 is a Very Big Deal Elon Musk promises $25,000 car, EV battery cell that costs half — but not soon 2022 Tesla Model S Plaid coming with three motors and more than 1,100 horsepower Cars we're driving: Long-term 2019 Subaru Forester 2020 Cadillac CT5 A conversation on child car seats Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Green Podcasts BMW Cadillac Subaru Tesla Volkswagen Safety Coupe Crossover Electric Luxury Performance Sedan