According to US and European officials, the US and its allies are prepared to respond to Russian cyber strikes amid growing tensions over Ukraine, with the breadth of retaliatory actions or sanctions varying depending on the severity of the hacks. Hours after Ukraine’s defense ministry and two banks were hacked, US President Joe Biden told reporters that Washington was working closely with NATO members and other partners to strengthen defenses against cyber threats. The attacks, which Western security experts suspect were carried out by Russia, were not unexpected, according to anonymous US an…