Taiwan has improved the fire control systems for its Ching-Kuo Indigenous Defense Fighters that allows them to fire TC-2A anti-radiation missiles from the under-fuselage rails that carry the TC-2 medium-range radar-guided air-to-air missile. These fighters used to carry only two TC-2 missiles, but recently received underwing rails that allow them to carry two additional TC-2s. This would allow each plane to carry four missiles, two of which could be TC-2As.--Stephen V Cole