A cyber-attack on an oil pipeline in the United States has caused widespread disruption and alarm. The Colonial Pipeline stretches thousands of kilometres from Texas to New Jersey and was shut down as a result of the attack, causing fuel shortages and price spikes on America's East Coast. This is the latest in a long list of recent ransomware attacks on US institutions and infrastructure, where groups have shut down crucial information networks or threatened to reveal trade secrets unless a fee was paid. President Biden has blamed a group based in Russia for the Colonial Pipeline attack; and while he did not hold Moscow directly responsible, he has blamed it and other nations for conducting cyber-espionage against America on a regular basis. Despite the advanced technological abilities of many US companies, and the investment of millions in digital security, hackers are continuing to find ways to break into government and commercial networks. So who are the hackers and how are their methods evolving? And how can the Biden administration ensure global cooperation in the fight against cyber-crime? Ritula Shah is joined by a panel of experts.