Almost 48 hours after a deadly attack on an aid convoy in Syria that killed about 20 civilians, Russia still furiously denies its jets or Syrian regime planes were responsible.

Here is what we know about Monday's attack that forced the U.N. to suspend its aid deliveries inside the war-torn country:

A ceasefire billed as the "last chance" to halt Syria's five-year war collapsed on Monday night as air strikes battered Aleppo and a U.N. aid convoy was hit near the city.

A ceasefire brokered by Moscow and Washington is due to take effect in Syria at sundown on Monday, the latest bid to end fighting between government forces and non-jihadist rebels. 

The 9/11 attacks of 2001 forever changed America and upended its foreign and national security policy, leaving the country for the past 15 years in a war against jihadists -- without ending the upheaval in the Middle East.

Barack Obama, who will leave the White House in January, is the president who tried to get the U.S. military out of the quagmires in Iraq and Afghanistan -- devastating "war on terror" conflicts launched by his predecessor George W. Bush in the wake of the suicide plane strikes that killed nearly 3,000 people.

A Syria ceasefire deal agreed by the United States and Russia could mark a "turning point" in the five-year conflict if implemented, U.S. Secretary of State John Kerry said Saturday.

North Korea's nuclear threat has grown significantly following its latest and largest nuclear test and a series of missile launches, analysts say, with some South Korean newspapers even theorizing about an atomic attack on Seoul.

The South Korean capital stayed calm Saturday, with residents immune to near-daily threats from their neighbor, but newspapers and analysts saw Friday's test as a game-changer.

Long cast in supporting roles in the shadow of their male counterparts, women are taking an increasingly active role in the organisation and execution of attacks by jihadist groups.

That much emerges clearly from Thursday's arrest of three heavily radicalised women plotting an attack in central Paris using a car laden with gas cylinders. 

The U.S. Navy again has accused Iranian patrol boats of harassing an American warship in the Persian Gulf, this time with a Revolutionary Guard vessel nearly causing a collision with the USS Firebolt. Why does this keep happening?

Saeed Beg and his family live in a two-room mud house with no electricity or running water, no bathroom, no kitchen and no furniture apart from a few threadbare rugs and a couple of thin mattresses.

With his mother, wife and five children aged from 8 months to 14 years sitting alongside, he describes life in the Sarkand valley of Afghanistan's far northeastern Wakhan corridor as "very difficult." As he talks, the face of a child laying kindling on the roof to dry appears in the pentagonal hole in the ceiling — typical of the homes of Ismaili Muslims, supported by five pillars. The hole lets in the fading evening light, and when Beg's wife Azalma sets a fire, the smoke curls up toward the velvety-blue, starlit sky.

In the heart of the Syrian city of Homs, workers clear rubble and clean the blackened walls of the war-ravaged old market in a bid to restore its former glory.