Tags: Barack Obama

Hackers associated with the Chinese government have tried to penetrate at least seven U.S. companies in the three weeks since Washington and Beijing agreed not to spy on each other for commercial reasons, according to a prominent U.S. security firm.

The United States approved conditional sanctions waivers for Iran on Sunday, though it cautioned they would not take effect until Tehran has curbed its nuclear program as required under a historic nuclear deal reached in Vienna on July 14.

The United States is sending 300 U.S. troops, along with surveillance drones, to Cameroon to bolster a West African effort to counter the Nigerian militant Islamist group Boko Haram, U.S. officials said on Wednesday.