The White House says it plans to share the information with NATO and U.S. allies . Sen. John McCain says the rebels need anti - tank and anti - aircraft weapons . Between 100 to 200 people are believed to have died in Sarin gas attacks , the White House says . After months of gaining ground , the rebels this month lost Qusayr -- one of its strongholds near the Lebanese border -- that was considered essential for its supply route . The United States plans to step up its military support of the rebels , the White House says .
The White House says it plans to share the information with NATO and U.S. allies . Sen. John McCain says the rebels need anti - tank and anti - aircraft weapons . Between 100 to 200 people are believed to have died in Sarin gas attacks , the White House says . The United States plans to step up its military support of the rebels , the White House says .