HOUSTON (KTRK) -- Local and federal investigators were at a northwest Houston home Friday night where an explosion sent a woman to the hospital. The woman was opening a package left at her doorstep in the 2100 block of Seamist Court Friday evening. She had found the shoe-sized box in front of her home about a day ago but didn't decide to open it until around 6:30pm Friday. ~~~SNIP~~~ The woman was transported to Northwest Memorial Hospital with facial injuries that are not life-threatening. Officials with the Alcohol, Tobacco and Firearms, as well as the Houston Police Department's homicide and...