Obama's tribute to Fort Hood victims
President Barack Obama has said the US "could do more" to keep firearms out of the hands of those suffering from mental health issues.
Mr Obama was speaking at a memorial for the victims of a gun attack at Ford Hood military base in Texas last Wednesday.
Army Specialist Ivan Lopez was reportedly being assessed for post-traumatic stress disorder when he shot dead three men, before turning the gun on himself.
- From the section US & Canada