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Secretary of State John Kerry said the coalition will support U.S. allies on the ground and continue to use airstrikes on militants. Kerry ruled out any "boots on the ground."

African-American parents have long discussed the importance of teaching children how to interact with police. Do parents in other communities have similar conversations? Join the discussion.

Ukrainian President Petro Poroshenko said he was hopeful that this would be a long-lasting peace. The central disagreements in conflict, however, remain.

Engineers have developed a low-cost material that efficiently sterilizes and desalinates water using only solar energy. The secret to the new technology is likely sitting right on your desk.

The shooting has stopped in Gaza, but the Israelis and Palestinians are now at odds over a large chunk of West Bank land where Israel plans to build more homes for settlers.

Three more people have been charged in connection with the 1973 murder of Chilean folk singer Victor Jara. Luis Andres Henao, Chile correspondent for the Associated Press, explains the situation.

After almost five months of conflict, the Ukrainian government and pro-Russian separatists have signed a truce to end the fighting. More than 2,600 people have died in the violence between the two sides, and hundreds of thousands have been forced from their homes.

President Obama and other NATO leaders are returning from Wales, after two days there spent discussing the future of the organization. The summit touched on topics that ranged from Ukraine to the Islamic State in Iraq and Syria.

Population growth, the cutting down of forests and increased mobility all contribute to the current crisis. "The virus hasn't changed," says one infectious disease expert. "Africa has changed."

Why does that sleek polyester T-shirt reek after 10 minutes, while the old-school cotton stays relatively sweet? Polyester attracts very different microbes, which may account for that special stink.