Energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation

Panelists are assembled at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation on Tuesday, Sept. 4.

Retired Gen. Wesley Clark speaks at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.

Sen. Amy KlobucharAmy Jean KlobucharOvernight Cybersecurity: Bipartisan bill aims to deter election interference | Russian hackers target Senate | House Intel panel subpoenas Bannon | DHS giving 'active defense' cyber tools to private sector Pawlenty opts out of Senate run in Minnesota Nielsen says 'possible' Trump used vulgar language in meeting MORE (D-Minn.) speaks at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.

Mike Lambach speaks at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.

Retired Gen. Wesley Clark speaks with Amy Caulkins at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.

Mike Lambach greets Sen. Amy Klobuchar (D-Minn.) at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.