The man charged with the attempted bombing of a US-bound plane is due to make his first appearance in a court in Detroit today.
The 23-year-old faces charges including attempted murder and attempting to use a weapon of mass destruction.
President Obama has made his second public address on the Christmas Day incident, announcing details of a security shake-up.
He said: “We must do better in keeping dangerous people off airplanes while still facilitating air travel. So taken together, these reforms will improve the intelligence community’s ability to collect, share, integrate, analyse and act on intelligence swiftly and effectively. In short, they willl help our intelligence community do its job even better and protect American lives.”
Authorities in Yemen say the failed bomber was recruited by al Qaeda in London. They also say the young man may have met the radical Muslim preacher Anwar al-Awlaki, a US-born cleric linked to the gunman who went on a shooting spree at a US army base in November.
Yemen maintains it is doing all it can to root out militants linked to al Qaeda.
It launched fresh military raids this week and says in one operation last month it killed more than 30 al Qaeda members.