New Delhi, May 2 -- The National Investigation Agency (NIA) chief, Sadanand Date, on Thursday visited Baisaran meadow in Pahalgam for firsthand assessment of the attack site, people familiar with the development said. An Indian Police Service (IPS) officer of 1990-batch from Maharashtra, Date, according to officers close to him, has an excellent understanding of investigating terrorism cases and that his inputs will be useful for the probe team. Date was among the first responders to 26/11 Mumbai attackers and personally, along with his team, took on two terrorists. The director general, an officer said, "reached the Baisaran meadow along with the investigation team and other experts on Thursday morning and stayed at the attack site for nearly three hours". The investigators have already conducted a three-dimensional, 3D, mapping of the attack site to reconstruct the scene and to understand the duration, exact location, and routes taken by the terrorists involved. Meanwhile, the agency continued questioning of several overground workers who it suspects may have a role and may have helped the terrorists although it has not reached any conclusion yet, said a second officer. The federal agency on Sunday formally took over the probe into the attack, carried out by the Lashkar-e-Taiba (LeT) through its proxy The Resistance Front (TRF)....