The White House has said that it has put all options on table to tackle the threat posed by nuclear-armed North Korea.
"I think it's clear to me that the ISI has connections with terrorist groups," General Joseph Dunford, Chairman of the US Joint Chiefs of Staff said.
Media reports said North Korea has successfully miniaturised a nuclear warhead that can fit inside its missiles.
The Islamic State group has released a video showing the beheading of US aid worker Peter Kassig in a warning to Washington as it prepares to send more troops to Iraq.
More than a year after he was nominated by President Barack Obama, the US Senate, defying the powerful pro-gun lobby National Rifle Association, voted to confirm Dr Vivek Hellegere Murthy as the first Indian American US Surgeon General and the youngest ever at age 37, in a cliff-hanger of a 51-43 vote.