[by:www.51voa.com] [00:00.00]更多听力请访问51VOA.COM [00:00.12]The United States government is increasingly using social media [00:06.88]to investigate people who may represent a security threat to the country. [00:14.07]The latest example comes from the Department of Homeland Security's [00:20.00]Customs and Border Protection office. [00:23.84]It wants to ask foreign visitors to provide information [00:29.16]about their accounts on social media sites like Facebook and Twitter. [00:35.52]An optional – or non-required – question would be added [00:41.72]to the form that people must complete before entering the United States. [00:48.72]The form asks information like the person's name, [00:53.88]phone number, and countries they have visited since 2011. [00:59.56]The proposed social media question would only concern travelers [01:05.08]who do not need a visa to enter the United States. [01:10.12]Travelers from 38 countries are permitted to enter the U.S. without a visa. [01:18.31]The Customs and Border Protection office said in its proposal that [01:23.88]adding the question would affect about 24 million people. [01:29.36]There is a 60-day comment period for the public to share their opinion about the proposal. [01:37.76]U.S. lawmakers have also proposed bills [01:42.32]concerning the use of social media for researching possible terrorism links. [01:49.28]Senator John McCain sponsored a bill that would require the Department of Homeland Security [01:57.16]to look at internet activity and social media profiles of anyone seeking entry to the United States. [02:07.44]Senators Martin Heinrich and Jeff Flake [02:11.23]sponsored a bill that would permit the Department of Homeland Security [02:16.16]to "search open source information, [02:19.52]including internet and social media postings" of people applying for a visa to enter the U.S. [02:28.56]Senator Chuck Schumer has proposed a different plan [02:33.36]to help officials search for possible terror links. [02:38.00]He wants to reward people who send officials terrorism-related information from social media posts. [02:46.88]Anyone whose information leads to the arrest of someone planning an attack [02:52.80]in the U.S. would be paid money. [02:56.12]Schumer's proposal would make use of the Justice Department's Rewards for Justice program. [03:04.00]Schumer said that investigators need the public's help. [03:09.52]Schumer said he wants to award people who come forward with information [03:15.08]anywhere from $25,000 to $25 million. [03:22.72]In the House of Representatives, Congressman Stephen Fincher [03:27.60]proposed a bill that centered on stopping prisoners from becoming radicalized. [03:34.20]His bill would require volunteers in federal prisons [03:39.80]to provide their social media accounts during their background investigations. [03:46.12]Fincher called U.S. prisons a "breeding ground" for Islamic radicalization. [03:52.72]更多听力请访问51VOA.COM