Kurds had been hoping for coalition bombing around Kobani for days as militants encircled the town.
Fox News hosts are under fire after they made sexist comments about the United Arab Emirates' first female fighter pilot, Maj. Mariam al-Mansouri.
Obama, speaking at the UN, asked the world to join together to fight the militants and vowed to keep up military pressure against them.
The U.S. military said it was targeting 12 of the Islamic State group's "modular" refineries, which generate around $2 million a day.
The second wave of airstrikes on ISIS militants in Syria targeted their oil revenues.
The cost to the U.S. military of bombing ISIS may reach as high as $10 billion.
Sunni Arab states are supporting U.S. strikes against ISIS in Syria, but will have to deal with a worsening humanitarian crisis.
What's behind the major shift in Turkey's policies against the Islamic State group?
Monday's "unprecedented" joint effort reveals the anxiety that ISIS has caused in the Middle East for majority-Sunni countries.
The U.S. targeted the Khorasan group in Syria, an al Qaeda splinter, because it was planning an attack on the west.
The first round of airstrikes in Syria hit 14 ISIS targets.
House Speaker John Boehner said the airstrikes "must be part of a larger effort" to destroy ISIS.
After overnight airstikes in Syria, Obama said the next step to combat ISIS will be equipping and training moderate Syrian opposition forces.
The U.S. and its Arab allies began strikes at around 8:30 p.m. EDT Monday.
The U.S. and five Middle East allies hit ISIS targets in Syria Monday night.
At least 50 people were killed in the airstrikes, which targeted various militant groups across Syria, including ISIS and the Nusra Front.
The U.S., along with some of its Arab allies, began bombing the stronghold of the Islamic State group in Syria early Tuesday morning.
Airstrikes by the U.S. and several Arab allies killed at least 20 ISIS militants, but also reportedly claimed the lives of eight civilians.
Investors are interested to know how Apple will perform in the December quarter, the first full quarter after the release of the iPhone 6.
Iraqi President Fouad Massoum has expressed reservations about the involvement of Egypt, UAE and Saudi Arabia in airstrikes.
Analysts say Libya is turning into a conflict zone for competing regional powers.
Sunni Arab states have expressed support for the U.S. campaign President Barack Obama announced last week to destroy the Islamic State.