The exercise took place as a U.S. guided-missile submarine arrived in South Korea and envoys from the U.S., Japan and South Korea met in Tokyo.
At the Women20 summit, President Trump's daughter was asked to clarify her White House role and how it was compatible with her fashion business.
An appeals court says Trump's company must pay more than $300,000 over an unpaid bill.
A Thai man filmed himself killing his 11-month-old daughter in two video clips posted on Facebook before committing suicide, police said on Tuesday.
Kim Sang-duk's detention brings the total number of Americans held by the isolated country to three, and comes amid worsening tensions between the U.S. and North Korea.