NEW: The Senate Intelligence Committee posted the videos on its website
NEW: They'll likely be shown to House members Monday, a congressional aide says
The videos first obtained by CNN show the aftermath of a chemical attack
They are hard to watch, but do not prove who was behind the attack
Men sprawled on a tile floor, shirtless and convulsing. Children, too, seemingly unable to control their shaking and flailing. Panic and screams in the background.
These are some of the hard-to-stomach images that the Obama administration has shown a select group of senators in closed-door briefings to make the case that a limited military attack on Syria is justified.