International relationsSeven-state bloc involving India and Thailand deepen power grid, port connectivityBIMSTEC Secretary-General Indra Mani Pandey. The veteran Indian diplomat says the Bay of Bengal bloc is gaining momentum. (Photo by Toru Takahashi)DHAKA -- Rising global geopolitical tensions underscore the need for stronger regional cooperation to address economic and security challenges, the chief of a bloc involving seven South and Southeast Asian countries said.