By Devika Krishna Kumar NEW YORK (Reuters) – The U.S. government and the top fuel pipeline operator in the United States on Monday worked to secure the network that transports nearly half of the East Coast’s fuel supplies, as the group suspected of a ransomware cyberattack that caused it to shutdown last week said it was just trying to make money. The attack on Colonial Pipeline is one of the most disruptive digital ransom schemes reported and the resulting shutdown has disrupted fuel supply across the eastern United States, triggering isolated sales restrictions at retail pumps and pushing benchmark gasoline prices to a three-year high.