A raging California wildfire nearly tripled in size Friday as it threatened 4,000 homes, although firefighters said they had gained more control over it.
US President Barack Obama would not say Friday whether the United States recognizes Nicolas Maduro as the winner of last month's Venezuelan presidential election.
The prestigious TED gathering known for perspective-shifting presentations by the brilliant and famous is tailoring "ideas worth spreading" for a television audience.
The first-ever manned airplane that can fly by day or night on the sun's power alone soared over the western United States late Friday on the first leg of cross-country journey.
Alleged Boston bomber Dzhokhar Tsarnaev has told investigators he and his brother had originally planned to commit suicide attacks during Fourth of July celebration.
The accidental shooting death of a two-year-old at the hands of her five-year-old brother has revived the perennial gun debate in the United States, where weapons are made just for kids.
US President Barack Obama heads to Costa Rica on Friday for a summit with Central American leaders on trade, immigration and the drug war after renewing security ties with Mexico.
After weeks of soaring tensions over US-South Korean war games that ended this week, North Korea has toned down its warlike rhetoric in what observers say is a sign that it may now be ready to talk.
China will likely use its growing power to try to force its way with Japan but it is doubtful that Beijing will enter a Cold War-style confrontation with the United States.
An innovative solar-powered aircraft is set to launch Friday from California on a flight across the United States, the first of its kind aiming to showcase what is possible without fossil fuels.
The United States said Thursday it was taking a fresh look at whether to arm Syria's rebels as the Damascus regime pressed an assault on opposition forces in the embattled city of Homs.
Oil prices took a breather in Asian trade Friday as investors locked in profits after a strong rally following the European Central Bank's decision to cut interest rates.
Suicide rates are rising dramatically among middle-aged Americans, according to US government statistics, which showed a 28 percent spike from a decade ago in the number of people taking their own lives.
The United States does not foresee taking Cuba off its blacklist of countries accused of supporting terrorism, which also includes Syria, Iran and Sudan.
US authorities on Wednesday released pictures of three men it said were present during the September 11, 2012 attack on the US mission in eastern Libya, saying it wanted to question them.