By EMILY SCHMALL and GRANT PECK, Associated Press NAKHON RATCHASIMA, Thailand (AP) — It's still unclear how a Thai soldier managed to steal from an army base the weapons he used to kill 29 people, but a gun researcher said the theft indicates that the facility had lax security. The gunman, identified as Sgt. Maj. Jakrapanth Thomma, snatched three assault rifles and two machine guns from the base and