We are standing on a roof, leaning back against the wall because of the snipers. We're right at the Syrian-Lebanese border, looking into the Syrian town of Jusiyah, standing with a rebel fighter who has his walkie-talkie going.
The rebel is part of a group fighting against the Syrian regime's army. The rebels have controlled a route into and out of Jusiyah for nearly a year.
It's a tiny village, but extremely important. To hold this little village is to hold the gateway so fighters can bring weapons, fighters, food and aid into Syria, and take refugees and injured fighters out of Syria.
The Syrian regime is trying to take Jusiyah. In the 10 minutes we stood on that roof, we saw at least 10 mortar rounds hit the village, if not more.
If the Syrian rebels had their way, they would hold on to Jusiyah and use it to create a kind of safe zone at the Lebanese-Syrian border, much like they have on the Turkish-Syrian border where fighters can easily move back and forth into the country and refugees find a haven in neat tent cities. Much of that is because the Turkish government, once an ally of Syrian President Bashar Assad, is now staunchly against his regime.
But this is Lebanon — and not just any part of Lebanon. It's a part of Lebanon that's mostly controlled by the militant group Hezbollah, which backs the government of Syrian President Bashar Assad.
For months, Syrian rebels have accused Hezbollah of sending fighters into Syria, but they had no real evidence this was happening. That evidence seemed to appear earlier this month, when Syrian rebels claimed they killed a Hezbollah leader inside Syria.
One rebel fighter, who goes by the name Abu Ahmed, says the killing was actually a mistake. He says the real target was a Syrian security officer who ran a detention center located in a school. Rebels say those who opposed the government were detained and tortured.
Abu Ahmed says the rebels laid a homemade bomb on the road, in hopes of hitting the Syrian security officer's car. Instead, they hit what they now believe was the Hezbollah leader's car.
Hezbollah itself acknowledged the leader's death but denied he was in Syria.
Imad Salamey, a political science professor at the Lebanese American University who studies Hezbollah, says there's a misperception in the region about the role the Shiite militant group is playing in Syria. He says that while many believe the group is engaged in a broad battle to help the Syrian army maintain control of the country, "I believe that Hezbollah selects its targets and selects its battles, inside or on the border area with Syria."
He says that includes making sure villages like Jusiyah do not fall into Syrian rebel hands, and that major swaths of Lebanon do not become a safe haven for rebels or their supporters. The problem, Salamey says, is it doesn't take much for limited engagement in a conflict to spin out of control and become something bigger.
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