Secretary Napolitano, a former governor and attorney general in the southwestern border state of Arizona, says prosecuting drug criminals is a more effective strategy than building border walls.

• 国土安全部部长纳波利塔诺以前是美国西南部边境州亚利桑那的总检察长。她说，起诉毒犯是比建造边境围墙更有效的战略。