The Obama administration acknowledged publicly for the first time that four US citizens have been killed in drone strikes since 2009 in Pakistan and Yemen.

The vast tornado that struck an Oklahoma suburb on Monday afternoon dwarfed even the Hiroshima atomic bomb in its destructive power, according to scientists.

Man identified as Ibragim Todashev, who reportedly knew Tamerlan Tsarnaev as both were mixed martial-arts fighters

Stay or flee? Pick up loved ones or take cover? The choices made in the moments after the tornado warnings sounded were a matter of life and death

Former congressman resigned following 'sexting' scandal in 2011

At least 24 people, including nine children, killed by massive EF5 tornado

Nasa has released images taken by satellites showing the devastating tornado as it struck the town of Moore in Oklahoma.

Picture of Cobb family staggering out of Briarwood Elementary school featured on front pages of newspapers across the world

Teachers praised for using their bodies to protect pupils

In a video released by hospital staff to mark a year since the horrific attack, Ronald Poppo smiled and spoke publicly for the first time

The death toll may rise above 24 as some bodies may have been taken directly to funeral homes

The ferocity of Monday’s tornado was unprecedented and devastating

Terrifying amateur footage has captured the monster tornado that ripped through Oklahoma City surburbs, leaving a trail of devastation in its wake.

Residents of Moore are used to severe weather patterns – but the strength of Monday’s twister left them shocked and awed

China’s new leader, Xi Jinping, will confer with President Barack Obama next month in California, months earlier than expected, as both sides seek to stem a drift in relations troubled by issues from cyber-spying to North Korea.