<h1>US Secretary of State Highlights US-India Partnership as Key 21st Century Relationship on India's Republic Day.</h1> The partnership between the United States and India is anticipated to be a defining relationship of the 21st century, according to the US Secretary of State. On India's Republic Day, the Secretary highlighted the enduring friendship and cooperation between the two nations, emphasizing the potential of their economic ties. He expressed intentions to deepen collaboration, particularly in space research and within the Quad, which includes the US, India, Australia, and Japan, to promote a free and prosperous Indo-Pacific region. The Quad originated from joint efforts following the 2004 Indian Ocean earthquake and tsunami.