A decorated military veteran opened fire at the Washington Navy Yard on Monday in a burst of violence that killed 13 people, including the gunman, and set off waves of panic at the military installation just miles from the White House and U.S. Capitol。本周一，一名授勋老兵持枪袭击了美国华盛顿海军基地，包括持枪者在内的13人在这起暴力冲突中丧生。海军基地距美国首都、白宫所在地仅有几英里，该事件引起基地人员巨大恐慌。
The FBI identified the suspect as Aaron Alexis, 34, of Fort Worth, Texas, a onetime Navy contractor who attended a Buddhist temple and had two gun-related brushes with the law。美国联邦调查局证实，嫌疑人为艾伦-阿莱克西斯，现年34岁，得克萨斯州沃思堡人，曾为美国海军基地的非军人身份合同工，信仰佛教，并合法持有两把枪支。
He received a general discharge from the Navy Reserve in 2011 after a series of misconduct issues, a Navy official said. 根据一名海军官员透露，嫌疑人曾犯有大量不端行为，在2011年被海军预备役部队解雇。
He was killed in one of several gun battles with police。嫌疑人在与警方的交火中丧生。
The motive - and how he breached
security - remained unknown. About 12 people were injured, Washington Mayor Vincent Gray said, though it was unclear how many of them were shot。目前仍不确定他的作案动机和避开安全监控的方法。华盛顿市长文森特·格雷称，大约有12人在本次事件中受伤，但还不清楚其中有多少人受到枪击。
Hours after the incident, police were searching for a possible second suspect in an incident that raised questions about security at the Washington Navy Yard, about a mile south of the U.S. Capitol and 3 miles from the White House。枪击案发生几小时后，警方开始搜寻本事件可能存在的第二嫌疑人。这一行为令人们对华盛顿海军基地的安全性产生质疑，该基地位于美国首都南部1英里处，距白宫只有3英里。
Somehow the gunman managed to enter the Naval Sea Systems Command Headquarters building about 8:20 a.m. (1220 GMT) and started picking off victims from a fourth-floor atrium, witnesses said。目击者称，早上8点20分，持枪歹徒成功进入海军海上系统指挥总部大楼，在四楼中庭里挑选受害者并一一开枪射杀。
It was the worst attack at a U.S. military installation since U.S. Army Major Nidal Hasan opened fire on unarmed soldiers at Fort Hood, Texas, in 2009, killing 13 people and wounding 31 others. 这是2009年得州胡德堡案件之后发生过最恶劣的美国军事大楼暴力事件。在那起事件中，美国陆军少校奈达·哈桑向没有配备武器的士兵开火，导致13人死亡31人受伤。
Hasan, who said he acted in retaliation for U.S. wars in Muslim countries, was convicted and sentenced to death by a military jury in August. 哈桑声称他的目的是报复美国在穆斯林国家发起的大量战争，他被判有罪，并于八月被军事法庭执以死刑。
