'This has been the most difficult test for me':President Barack Obama interviewd by Karen Tumulty.

@article{Obama2009ThisHB,
  title={'This has been the most difficult test for me':President Barack Obama interviewd by Karen Tumulty.},
  author={Barack H Obama},
  journal={Time},
  year={2009},
  volume={174 5},
  pages={30-1}
}