Mumbai (Maharashtra) [India], September 20 (ANI): Railway minister Ashwini Vaishnaw on Saturday interacted with workers building the Mumbai-Ahmedabad bullet train tunnels, congratulating them for the breakthrough with the New Austrian Tunnelling Method (NATM). The union minister was seen shaking hands with the workers, as they held national flags and celebrated the breakthrough. 'Today, an important milestone has been achieved in the Mumbai-Ahmedabad bullet train project. An undersea tunnel is being constructed beneath the creek between Mumbai and Thane,' Minister Vaishnaw told ANI. In a significant milestone for the ambitious undersea tunnel project between BKC and Shillphata, the New Austrian Tunnelling Method (NATM) has successfully achieved a breakthrough for its 5 km tunnel stretch.