President Obama visits Joplin Missouri
29 May 2011 Last updated at 20:53 BST
US President Barack Obama has made a visit to the tornado-hit city of Joplin in Missouri, where 142 people are now known to have died.
Ahead of a memorial service, he told reporters that the disaster required a national response.
Later he attended a community memorial service at the Taylor Performing Arts Center on the campus of Missouri Southern State University.