Void where prohibited. Open to legal residents of the 50 United States or the District of Columbia age 18 or older. Offer runs 06/21/16–09/18/16 ("Offer Period"). During the Offer Period: 1) Visit a participating United Hub terminal to receive an Official "Pass the Baton" baton (the "Baton") (while supplies last), or visit http://www.united.com/teamusa and download the Virtual "Pass the Baton" baton (the "Virtual Baton"); and 2) Take a photo of the Baton and post the photo or the Virtual Baton to Twitter or Instagram with #UABatonDonation; or Post without a photo to Twitter with #UABatonDonation (the "Eligible Post"). You can also re-Tweet an Eligible Post and include #UABatonDonation in your comment for an additional Eligible Post. For each Eligible Post, United will donate ten (10) United award miles to the United States Olympic Committee (up to a maximum donation of 10,000,000 United miles). Offer donations limited to Eligible Posts on Twitter or Instagram up to donation limit. Post eligibility determined at United Airlines' sole discretion. The offer is not sponsored, endorsed or administered by or in any way affiliated with Twitter or Instagram. All posts must comply with the Terms of Twitter and/or Instagram. Do not post the same photo more than once to either social media platform. Please do not re-Tweet more than once. Sponsor: United Airlines, Inc., 233 S. Wacker Dr., Chicago, IL 60606.