The response will `` go on as long as it takes , '' Thad Allen says . In a statement released by the White House, President Barack Obama said he was "saddened to learn of this tragic loss and send our thoughts and prayers to all those affected. " A joint investigative team is still probing the cause of the explosion on the Deepwater Horizon rig April 20 , which killed 11 men and triggered the underwater oil gusher . Whether BP re-enters the reservoir would be a policy decision , he says .
The response will `` go on as long as it takes , '' Thad Allen says . In a statement released by the White House, President Barack Obama said he was "saddened to learn of this tragic loss and send our thoughts and prayers to all those affected." Whether BP re-enters the reservoir would be a policy decision , he says .