Saying a failure to connect and understand critical intelligence led to the attempted airline bombing in Detroit on Christmas Day, Barack Obama, the US president, has ordered changes in security measures.

In a national address, he said the country's security was ultimately his responsibility, as he unveiled a series of steps to better collect and analyse intelligence in the wake of the botched plot.

Al Jazeera's Ghida Fakhry talks to PJ Crowley, a spokesperson for the US state department, and Jack Rice, a former CIA agent and field operations officer, on Obama's measures.