Ukraine's daring attack on Russia shows that surprise is not dead, even in a drone war, analysts say

• Russia and Ukraine have struggled to employ surprise in a war with so much drone surveillance.
• But Ukraine launched a shock incursion into Russia this week, appearing to catch it off guard.
• Analysts said Russia's response shows surprise is still possible, albeit difficult.

Ukraine's new incursion into Russia shows that surprise is still possible despite ubiquitous surveillance, analysts said.