British Foreign Secretary Liz Truss.Bianca De Marchi-Pool / Getty Images The G7 should serve as an "economic NATO," the UK's foreign secretary said in a speech Wednesday night. "If the economy of a partner is being targeted by an aggressive regime, we should act to support them," Liz Truss said. She also warned the war between Russia and Ukraine could last five years. The G-7 should act as an "economic NATO" to protect against attacks in global markets, UK Foreign Secretary Liz Truss said in a speech on Wednesday night.She said countries must be ready to push back against "aggressors" trying to coerce others using economic power.