it is lawful to pray, fast, make the profession of faith, or give alms in a mosque. it is lawful to go to a mosque while making the hajj. therefore it is lawful to make jihad from a mosque. it is not lawful to prevent fellow Muslims from making jihad.
fatwa on you.
Good idea, all the mosques in the us could have an "accident" on the same day. Wow what a coincidence!