I found this article on getting through customs and thought it was super cool. All you techies will love this!
The fastest way through customs is with a downloadable app available to both iPhone and Android users. The app allows users to enter their passport and travel information, submit it electronically, and generate a receipt to show at customs and immigration checkpoints. It's called Mobile Passport and its technology eliminates the need for traditional forms and line waits.
The use of the Mobile Passport app is limited to U.S. citizens holding a valid U.S. passport, as well as Canadian citizens with a valid Canadian passport. Five airports are currently a part of the program: Atlanta (ATL), Miami (MIA), Seattle (SEA), Chicago (ORD), and San Francisco (SFO). The goal is to have at least 20 airports accepting the app in 2016.
When your plane lands on U.S. soil at one of the participating airports, open the app, complete the steps, and you'll have your immigration and customs clearance ready before even stepping off the aircraft. The profile includes the traveler’s name, gender, date of birth, and country of citizenship. The process is easy peasy! Complete the “New Trip” section by selecting your arrival airport and airline, take a selfie, and answer a series of custom declaration questions. Once you submit the form through the app, you will receive an "electronic receipt with an Encrypted Quick Response (QR) code," which expires four hours after it is issued. Bring your passport and mobile device with your digital bar-coded receipt to a Customs officer and that's it!