A new campaign by a nationwide coalition of military veterans is targeting members of Congress who are opposed to increasing the use of biofuels in the military.

The Operation Free campaign has released a new television advertisement entitled “Trust,” featuring Marine Corps veteran Chris Marzoni who served in Iraq as part of Operation Iraqi Freedom. In the spot, Marzoni says advanced biofuels promise to provide our military a source of fuel besides petroleum, which ties us to a volatile world market and hinders mission readiness.

The first version of the ad to run targets Senator Rob Portman (R-OH), who recklessly voted to halt the Navy’s biofuels programs despite their promise to reduce the military’s dependence on petroleum-based fuels. In the ad, Marzoni asks why Senator Portman doesn’t trust our military leaders when it comes to keeping America safe. The ad is part of a significant buy which will also run in Arizona, North Carolina, Ohio, Pennsylvania, and Virginia.

Watch the ad with Marzoni here: