http://www.politico.com/story/2017/09/28/ryan-zinke-charter-military-planes-interior-243280

Interior Secretary Ryan Zinke and his aides have taken several flights on private or military aircraft, including a $12,000 charter plane to take him to events in his hometown in Montana and private flights between two Caribbean islands, according to documents and a department spokeswoman.

Zinke is at least the fourth senior member of the Trump administration to have used non-commercial planes at taxpayer expense, along with Environmental Protection Agency Administrator Scott Pruitt, Treasury Secretary Steven Mnuchin and Health and Human Services Secretary Tom Price. President Donald Trump has fumed at Price's pricey travel, and Democrats say the revelations demonstrate a cavalier attitude by Cabinet members toward excessive spending.