As the earth shook in Nepal, tremors were felt over the border in India as well.
It was a call to action: Within hours of the first 7.8 magnitude quake, India began planning a massive cross-border aid mission.
With each hour, the scale of the devastation in Nepal became clearer -- some 3,862 people are known to have died so far -- and plans in India, where 72 people were also killed, got bigger.
On Sunday alone, India delivered 187 tons of supplies, including 50 tons of water, 22 tons of food and 2 tons of medicine. And there will be more to come.
Hundreds of trained disaster relief troops landed in Kathmandu and quickly got to work.
With each flight in, there was a flight back out, packed with Indians and other nationals escaping to safety: 2,000 and counting have fled so far.
By Monday, India was in full-scale crisis mode: From airports across India, planes flew in loaded with aid, and trucks made the trip by land from India's east, aiming for more remote areas.
