13 Investigates: How long should it take for the postal service to deliver your packages?
USPS test: We mailed 4 packages with GPS trackers to see how quickly they got there
Inside the USPS distribution center on one of its busiest days
USPS distribution center in OKC works to get last minute packages out before Christmas
An inside look at largest USPS distribution facility amid holiday shipping rush
Local businesses say outgoing packages stuck for 'weeks' at USPS distribution center in Indianapolis
Good Question: How does the post office deliver mail?
How USPS Sorts Mail
Systems at Work
See Everything That Happens When a Package is Shipped | WIRED
How mail agencies identify suspicious packages
USPS workers see exponential increase of packages during holiday season
How helpful technology supports holiday shipping process
Portland USPS Processing and Distribution Center takes on the holiday rush
Long delays outside mail distribution center in Metro Detroit
USPS announces plans to modernize Reno distribution center
Greensboro residents frustrated with USPS package delays
News 12 gets behind-the-scenes look at USPS processing center's high-tech shipping
How Overnight Shipping Works
USPS officials in North Texas hoping for a better 'delivery December' than last year
