Hezbollah obtains some weaponry from black markets and possibly from the Lebanese military. Dual-use technology, including night vision goggles, laser rangefinders, GPS receivers, advanced aircraft-analysis and design software, stun guns, nitrogen laser cutters, naval equipment, and ultrasonic dog deterrents were purchased from private vendors in the United States and Canada in the early 2000s. Hezbollah is able to fight at night and has advanced night vision technology. Israel and some sources claim that Iran has established two underground weapons factories in Lebanon's mountainous Bekaa valley region, producing Fateh-110 missiles and many other weapons. Construction reportedly began after 2012. Hezbollah and the IRGC have previously suggested that the party could build some of its own weaponry. The factories supposedly have a capacity of hundreds of missiles per year.