'I'm kinda familiar with what young soldiers are taught,' says retired US Army Lt General Mark Hertling. He recently penned an opinion piece in The Bulwark, titled: 'What Americans Should Understand About the Military Disobeying Illegal Orders'

'Mark Kelly is more than what he appears to be,' says Hertling of his relationship with the Senator who was also an astronaut.

He explains the two different oaths for enlisted service members & officers.