HANOI - Vietnam has threatened to shut down Facebook in the country if it does not bow to government pressure to censor more local political content on its platform, a senior official at the U.S. social media giant told Reuters. Facebook complied with a government request in April to significantly increase its censorship of “anti-state” posts for local users, but Vietnam asked the company again in August to step up its restrictions of critical posts, the official said. “We made an agreement in April. Facebook has upheld our end of the agreement, and we expected the government of Vietnam to...