Additional Study Information: Depression affects 15 million Americans each year. Depression and suicidal behavior are transmitted in families due to a combination of genes and environment. Depressive illness and the risk of suicidal behavior are associated with altered brain function that we can detect with brain imaging. Therefore, this study aims to examine brain function in adults who have a relative who has suffered from depression and made a suicide attempt. The goal of the study is to detect which adult children are at risk of developing depression and who is not going to develop depression. Procedures include brain imaging (MRI and PET), neuropsychological testing, as well as a clinical assessment. The compensation for participating is up to $600.