Diplomatic sources have also said the United States is providing intelligence on Syrian troop movements , which is then passed to rebel groups . The White House warns of a `` dire '' situation for Syrian civilians . President Barack Obama said on Friday that the United States is prepared to take military action against Syria if it uses chemical weapons again. Obama also has OK 'd covert , nonlethal support for Syrian rebels , officials say .
The White House warns of a `` dire '' situation for Syrian civilians . President Barack Obama said on Friday that the United States is prepared to take military action against Syria if it uses chemical weapons again. Obama also has OK 'd covert , nonlethal support for Syrian rebels , officials say .