HONG KONG, Sept 21 (Reuters) - Hong Kong police fired tear gas to try to disperse democracy protesters marching on Saturday after pro-China groups pulled down some of the "Lennon Walls" of anti-government messages in the Chinese-ruled city. (Writing by Nick Macfie; Editing by Tom Hogue)

DUBAI, Sept 21 (Reuters) - Iran will pursue any aggressor, even it carries out a limited attack, and seek to destroy it, the head of the elite Revolutionary Guards said on Saturday, after attacks on Saudi oil sites which Riyadh and U.S officials blamed on Tehran.

ROME, Sept 21 (Thomson Reuters Foundation) - A doubling of international funding for agricultural science is needed to help half a billion small farmers cope with climate change - or the world risks mass migration and widespread instability, said the head of a major farm research network.

CEDAR RAPIDS, Iowa/NEW YORK (Reuters) - Former Vice President Joe Biden's decades-long record on lesbian, gay, bisexual and transgender issues was scrutinized on Friday in Iowa at the first major forum focused on the topic during the 2020 Democratic presidential nominating contest.

CEDAR RAPIDS, Iowa/NEW YORK, Sept 21 (Reuters) - Former Vice President Joe Biden's decades-long record on lesbian, gay, bisexual and transgender issues was scrutinized on Friday in Iowa at the first major forum focused on the topic during the 2020 Democratic presidential nominating contest.

RACHEL, Nev., Sept 20 (Reuters) - UFO enthusiasts drawn by alien-themed festivities poured into rural Nevada on Friday near the Area 51 U.S. military base, but fears of a mass raid on the remote site or a public safety crisis proved unfounded, with only five people arrested.

(Reuters) - NFL star wide receiver Antonio Brown, who has been accused of rape by his former personal trainer, was released on Friday by the New England Patriots, the team said less than two weeks after signing the prolific pass-catcher to a contract.

(Reuters) - A bus carrying Chinese tourists careened off a road and crashed near Bryce Canyon National Park in Utah on Friday, killing four people and injuring the remaining 26 people aboard, several of them critically, authorities reported.

(Reuters) - U.S. trade regulators on Friday approved 10 out of 15 requests for tariff exemptions filed by Apple Inc amid a broader reprieve on levies on computer parts, according to a public docket published by the U.S. Trade Representative and a Federal Register notice.