The leaders of China, Russia, India, Iran and other nations in the BRICS club gather in New Delhi this weekend, but wars and soaring energy prices divide them.

China sees the BRICS group as a vehicle for challenging American power. India wants to keep the group broad enough to avoid choosing sides.

Our reporter, Apoorva Mandavilli, goes inside a mosquito factory in Brazil, where scientists are producing millions of mosquitoes to fight deadly tropical diseases in a warming world.

The city of Belém in northern Brazil was overwhelmed by an outbreak of dengue two years ago. An all-out municipal effort has reduced cases and may offer lessons to American cities.