New submitter dubner writes Simply hand the law enforcement officer your mobile phone. That's what you can do in Iowa rather than "digging through clutter in your glove compartment for an insurance card." And soon your driver's license will be available on your phone too, according to a story in the (Des Moines Register). Iowans will soon be able to use a mobile app on their smartphones as their official driver's license issued by the Iowa Department of Transportation. Some marvelous quotes in TFA: "The new app should be highly secure ... People will use a pin number for verification." And "Branstad (Iowa governor)... noted that even Iowa children are now working on digital development projects." A raft of excuses ("battery's dead") and security problems come to mind; how would you implement such a system?