After two years of pandemic, masks, lockdowns, racial strife and political insurrection, stress among American kids was already at crisis proportions. • Then Russia invaded Ukraine and “World War III” was suddenly a trending topic. On Feb. 27, Russian President Vladimir Putin put his country’s nuclear forces on “high alert.” • Mental health counselors say the news on TV and social media has reignited Cold War fears among some of their young patients, including prospects of nuclear annihilation that harken back to a time when students were told to hide under their desks in case of a Soviet attack. • “We are definitely seeing kids struggle with anxiety,” said Michael Tozzoli, CEO of Ridgewood-based West Bergen Mental Healthcare. “I had a kid in my practice the other night who said he kept hearing that COVID was a once-in-alifetime thing and now you’re telling me there’s a possible nuclear war?”