Update: Some offers mentioned below are no longer available. View the current offers here.Each Saturday, we round up news stories that you may have missed from the week before, including several that already appeared on The Points Guy, and some more that we haven’t covered yet. If you’re an avid TPG reader, scroll down for the new stuff. Here’s the top miles, points and travel news you may have missed this week:Should you use the Sapphire Reserve or Amex Platinum when you purchase airfare?Chase Sapphire Reserve vs. Amex Platinum: Which is Better for Airfare Purchases?American Express has responded to the entry of the Chase Sapphire Reserve on the premium travel card market by adding a bonus category to the Amex Platinum that awards 5x points on airfare purchases, versus the Sapphire Reserve’s 3x for all travel purchases. Which card should you use when you book your next plane ticket?United’s made some big changes to the way you can book award tickets online.United Surprises Members With Another Award-Pricing ChangeAfter placing greater restrictions on its award-routing rules, United’s made some changes to the way its website prices multi-city award tickets that comes as an unpleasant surprise to many flyers.Hang out with TPG at reader events in Boston, Philadelphia and Dallas next week.New TPG Reader Events in Boston, Philadelphia and DallasJoin TPG for a night of cocktails, hors d’oeuvres and points and miles talk at reader events in Boston, Philadelphia and Dallas next week. One lucky attendee at each event will walk away with two free nights at any SPG property worldwide (up to SPG Category 6).Delta made a rare improvement in perks for its lowest-level elite members.Delta Silver Medallions Now Eligible for Complimentary Upgrades on Award TicketsSign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Despite many instances of customer-unfriendliness, Delta is making a positive change for its lowest-level elite members. Silver medallions will now be eligible for complimentary upgrades to first class 24 hours before departure.The Boeing 737 is the world’s most popular aircraft by number sold.Wired Takes Viewers Inside the 737 MAX Test PlaneCheck out a video from Wired showing the various tests Boeing’s new 737 MAX goes through before it can be put into commercial service by an airline.In Other News…The Tower at Dubai Creek Harbour will be the world’s tallest tower when completed.Construction Has Begun on Dubai’s New Tallest Tower in the WorldWe’ve seen this before. Dubai will soon be home to the world’s tallest tower — again. The Tower at Dubai Creek Harbour designed by Santiago Calatrava will surpass Dubai’s Burj Khalifa as the world’s tallest tower. It’s set to be completed by 2020, and while the exact height hasn’t yet been revealed, it will have to be taller than 2,080 feet — the height of the Burj Khalifa.Photo of Richard Anderson courtesy of Spencer Platt / Getty Images.Richard Anderson Resigns as Executive Chairman of Delta Air LinesIn a surprising development, Richard Anderson, former CEO of Delta Air Lines, resigned his position as Executive Chairman of the airline on Tuesday. Not much is being said on the reasoning for his abrupt departure, but stay tuned for any further updates.Two Pittsburgh Steelers got to go for a ride in a self-driving car.Watch Two Pittsburgh Steelers Experience a Self-Driving CarStephon Tuitt and Cam Heyward of the Steelers took a ride in one of Uber’s self-driving cars in Pittsburgh. Check out the funny — and actually very informative — video here.Browse the web for free on select flights thanks to a promotion from ANA.Get Free Wi-Fi on Select ANA Flights Between New York/Chicago and Tokyo HanedaANA is offering free in-flight Wi-Fi for flyers traveling on the carrier’s flights between New York (JFK) and Tokyo (HND) as well as Chicago-O’Hare (ORD) and HND. The promotion only applies to a very limited selection of flights and you must purchase a seat in the premium economy cabin or higher to be eligible.Earn a bunch of United miles when you rent with Hertz thanks to a promotion. Photo credit George Rose/Getty Images.Earn up to 10,500 United Miles With This Promotion From HertzHertz is offering a great targeted offer for select Chase United MileagePlus Explorer cardholders. Not only will you save up to 40% off your next rental, but you can also earn up to 10,500 bonus miles when you rent a car twice between now and December 31, 2016.