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We present the first 1.3 mm (230 GHz) very long baseline interferometry modelimage of an AGN jet using closure phase techniques with a four-element array.The model image of the quasar 1924-292 was obtained with four telescopes atthree observatories: the James Clerk Maxwell Telescope (JCMT) on Mauna Kea inHawaii, the Arizona Radio Observatory's Submillimeter Telescope (SMT) inArizona, and two telescopes of the Combined Array for Research inMillimeterwave Astronomy (CARMA) in California in April 2009. With the greatlyimproved resolution compared with previous observations and robust closurephase measurement, the inner jet structure of 1924-292 was spatially resolved.The inner jet extends to the northwest along a position angle of $-53^\circ$ ata distance of 0.38\,mas from the tentatively identified core, in agreement withthe inner jet structure inferred from lower frequencies, and making a positionangle difference of $\sim 80^{\circ}$ with respect to the cm-jet. The size ofthe compact core is 0.15\,pc with a brightness temperature of$1.2\times10^{11}$\,K. Compared with those measured at lower frequencies, thelow brightness temperature may argue in favor of the decelerating jet model orparticle-cascade models. The successful measurement of closure phase paves theway for imaging and time resolving Sgr A* and nearby AGN with the Event HorizonTelescope.

Resolving the inner jet structure of 1924-292 with the EVENT HORIZON TELESCOPE