The phrase "a briefing at a" is correct and usable in written English.
It can be used when referring to a specific location or event where information is being presented or discussed.
Example: "We will have a briefing at a designated conference room to discuss the project updates."
Alternatives: "a meeting at a" or "a session at a".
A few days later, with the relocation of Alabama's first nest imminent, Share the Beach's eight team leaders were called by federal authorities to a briefing at a wildlife refuge near the city of Gulf Shores.
Senior Labour aides accused No 10 of playing "outrageous political games" after Cabinet Office officials offered Corbyn and his team a briefing at a time when he was clearly unable to attend.
Incomplete figures for American casualties, given in a briefing at a Marine base 30 miles east of Najaf at 1 p.m. local time on Friday, were that two marines had been killed and 12 wounded.
"Europe has traditionally had a more regulated system than the United States," Mr. Mankiw said in a briefing at a two-day conference at the Organization for Economic Cooperation and Development.
The agency is expected to handle about 170 billion items this year, well below the peak of more than 210 billion, Mr. Potter said in a briefing at a convention for the mailing industry.
"I hesitate to use a phrase like hopeful, because these issues are so difficult," Mr. Lockhart said at a briefing at a press center several miles from Camp David.
Two months later, Ibrahim Gambari, of Nigeria, the U.N. envoy to Burma, was scheduled to give a briefing at an ASEAN meeting in Singapore on the prospect of talks between the Burmese government and Aung San Suu Kyi.
Israeli soldiers take part in a briefing at an army staging area along Israel's border with the Gaza Strip on July 30 , 2014 as they prepare to enter the Gaza Strip.
"The experiment has worked without a hitch," Dr. Joachim Joseph, a principal investigator, told a briefing at the National Aeronautics and Space Administration.
Mourinho was supposed to speak from 6.30pm at the same location where Pep Guardiola held a briefing at 11.30pm in a stifling room packed with media.
"Today... Turkey has taken a historic decision," he told a briefing at his official Istanbul residence, the Huber Palace.
