New Delhi: A security personnel stands guard at the National Investigation Agency (NIA) headquarters, in New Delhi, Friday, Apr. 11, 2025. The NIA on Friday took Mumbai attacks mastermind Tahawwur Hussain Rana into 18-day custody, during which he will be questioned in detail to unravel the complete conspiracy behind the deadly 26/11 terror strike. (PTI Photo/Vijay Varma) (PTI04_11_2025_000077B)