Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Philippine Official Defends US Pact After Duterte Threat Associated Press MANILA - The Philippine foreign secretary warned Thursday that abrogating a security accord with Washington would undermine his country's security and foster aggression in the disputed South China Sea. The warning came after President Rodrigo Duterte threatened last month to give notice to the U.S. to terminate the Visiting Forces Agreement, which allows American forces to train in the Philippines, if the reported cancellation of the visa of his political ally, Sen. Ronald dela Rosa, was not corrected within a month. "I'm warning you ... if you won't do the correction on this, I will terminate the ... Visiting Forces Agreement. I'll end that son of a bitch," the brash-speaking Duterte said in a Jan. 23 speech. .