In Syria, some people are fighting against their government with weapons like guns and bombs, but they don't have big weapons like tanks or planes. So they have been trying to make their own weapons out of things they find or can buy.
One of the things they make is improvised artillery. Artillery is a type of weapon that shoots big shells or rockets very far. To make improvised artillery, they usually start with a big metal pipe or cylinder that they can fill with explosives. They then aim it in the direction they want to shoot and light the explosives. The explosion shoots the shell or rocket out of the pipe.
It's important to know that making improvised artillery is very dangerous. It can be hard to aim the weapon correctly, and if something goes wrong, it could explode and hurt or kill the people who made it or anyone nearby.
However, for the people who are fighting against the government, improvised artillery has been an important tool. It allows them to attack from far away and to try to strike government targets without putting themselves in as much danger.
Overall, making improvised artillery is a risky way for people in Syria to try to protect themselves and fight for what they believe in.