The two men allegedly purchased explosives to use during demonstrations in Ferguson, Mo., Reuters reported.
President Barack Obama calls for calm, as agents prepare for possible unrest in the wake of a grand-jury decision in the Mike Brown shooting.
The Iranian nuclear talks are set to end Monday, but fear of a clandestine nuclear program could lead to an extension.
Al-Shabab, an offshoot of the defunct Islamic Courts Union, currently has control over large parts of Somalia.
The president signed a secret order to expand U.S. forces' role in the war-torn country, according to a New York Times report.
The radar systems constitute a piece of the $118 million in nonlethal aid the U.S. has committed to providing Ukraine.
Mali has become the latest concern for the United Nations, as six people have died and almost 500 are being monitored in the country.