.walter reed national military medical center in bethesda, maryland, would not give any details about why the first lady was still there. . october 2016 (28) .the coroner's report did not specify what made the vape pen explode. http://lm360.us/Mcfall-grandpa-of-Selia-from-Bernes?Freebornm=97 see all results matching 'mub'