He wanted to "go jihad." From [1] AP, with thanks to the Constantinopolitan Irredentist:

It was after a sting operation yesterday that was set up when Ahmed Al-Uqaily told an acquaintance he wanted to "go Jihad" over the war in Iraq.

FBI terrorism agents arrested the Al-Uquaily, 33, after he took possession of two disassembled machine guns, four disassembled hand grenades and hundreds of rounds of ammunition.

Court documents show Al-Uqaily also was interested in getting missiles used to disable tanks.

Authorities said he expressed animosity toward the Jewish community, but did not give specific plans.