A depot building housing start-up companies in Ukraine's western city of Lviv has a false sense of Silicon Valley, with young employees working in garden deck chair, laptops on their knees. But inside, the atmosphere is quite different as people zig-zag between piles of bulletproof vests and cardboard boxes filled with helmets, ready to be sent to the front. Ukraine's tech sector has had to adapt to the Russian invasion, becoming one of the country's economic lungs supporting the war effort. IMAGES AND SOUNDBITES