Noida’s skyline will undergo a drastic change on Sunday with the demolition of Supertech’s illegal twin towers: Apex and Ceyane. Over 3,700 kg of explosives will be used to bring down the nearly 100-metre-tall structures – taller than Delhi’s iconic Qutub Minar – in just 9 seconds. Last-minute checks of explosive and related arrangements for demolitions were done on Saturday.