Sela Tunnel is a road tunnel at 3,000 metres which ensures all-weather connectivity between Guwahati in Assam and Tawang in Arunachal Pradesh. This tunnel is the longest bi-lane tunnel in the world at 13,000 feet. From Wikipedia
The United States has officially recognized Arunachal Pradesh as part of India and strongly condemned China's territorial claims, emphasizing support for India amidst escalating tensions.
