what? >> that's what we're interested. organized criminal groups and organized crime. we're not interested in somebody growing a pot plant on their window. this is about taking over houses completely for the purpose of farming cannabis. we don't want to know who you are, we want to know and guarantee we will not compromise your identity. >> this scheme is being rolled up -- i mean rolled out here in london. it's been successful elsewhere, but we have yet to see if this will even scratch the surface. zain verjee, cnn. >> i could have said that guy said we're not looking for people growing a pot plant on their window sill but zain looked really relieved. i believe she did. >> very innovative approach there. all right. straight ahead, an exclusive look at the world of gaza militants. >> islamic jihad has invited us