This was a particularly concerning case: https://www.theverge.com/2017/2/12/14583124/nasa-sidd-bikkannavar-detained-cbp-phone-search-trump-travel-ban https://ww

This was a particularly concerning case: https://www.theverge.com/2017/2/12/14583124/nasa-sidd-bikkannavar-detained-cbp-phone-search-trump-travel-ban https://www.theverge.com/2017/2/12/14583124/nasa-sidd-bikkan... Bikkannavar says he was detained by US Customs and Border Patrol and pressured to give the CBP agents his phone and access PIN. Since the phone was issued by NASA, it may have contained sensitive material that wasn’t supposed to be shared. Bikkannavar’s phone was returned to him after it was searched by CBP, but he doesn’t know exactly what information officials might have taken from the device. Once he unlocked his phone, they were gone with it for 40 minutes. Plenty of time to copy the device contents and peruse at their leisure.