trying to weaken the government's air power, which poses their biggest threat. the escalating violence now raising serious concerns about israel's security. leland vittert is in go land heights, an area between israel and syria. are the rebels making any gains? >> reporter: right now so far there is a lot of bang, bang, that's what we are seeing in the video the rebels are posting online. not a lot of strategic games. the rebels are tries trying to lay siege to three to four regime air bases in the north that are used to bomb rebel position and also resupply government troops. these one of the things the rebels are trying to deny. the government forces are hitting back and so far have repullsed these rebels in each one of the instances. the thing to note when you're watching the video is how much better armed the rebels are because they've stolen weapons from the government cases