44 past the hour. beautiful shot of washington, d.c. the sun has yet to come up, but we're all up working. get to work. senate lawmakers are expected to grill the head of instagram today in a hearing about the social media app's effects on teenagers. he'll testify in front of the hearing, and the chair of hearing, richard blumenthal. part of the judiciary and armed services committees. good to have you. there have been so many revelations about the impact of instagram, especially on teen girls, which everything to lack of confidence, lack of sleep, to suicidal ideation. what do you hope to hear from the head of instagram today?