It /sounds like/ this is essentially to analyze in-airport traffic flow to determine weak points vulnerable to attack, which isn't a terrible idea, but given the timing of the proposal so soon after attempting to ban anyone from majority-Muslim countries, I suspect there's something more sinister buried in the legal jargon.
This appears to be an attempt to rewrite the 2012 security strategy and regulations without any clear rationale. The text of the bill provides no justification. Full text here: https://www.congress.gov/bill/115th-congress/house-bill/665/text
Where to begin...? The TSA: talk about a group that treats you as guilty until proven innocent (i get it, it's not all TSA agents). What other organization gets to search every individual without provocation? Without more information, I will need to say nay until a better explanation is given. Maybe it's the verbiage or maybe it's the app.