The United States confronted North Korea on Sunday over its latest missile test amid signs that time is running out to halt the rogue nation’s headlong rush to build a nuclear weapon capable of reaching American cities.

The U.S. flew two B-1 bombers over South Korea in a show of force after North Korea again tested an intercontinental ballistic missile on Friday.

North Korea’s latest missile test signaled that parts of the U.S. mainland, including Los Angeles and Chicago, may be in range of Pyongyang’s weapons.

Vice President Pence said Sunday that the U.S. and its allies plan to increase pressure on North Korea to end its nuclear program.

“The era of strategic patience is over,” Pence said while in Estonia. “The president of the United States is leading a coalition of nations to bring pressure to bear until that time that North Korea will permanently abandon its nuclear and ballistic missile program.” 

The missile flew 2,300 miles into space and flew for about 45 minutes. If the missile was on a flatter trajectory, it could reach U.S. cities, according to David Wright, an analyst at the Union of Concerned Scientists, and other experts.

Friday’s missile test was North Korea’s second test this month of an intercontinental ballistic missile (ICBM). The launches are part of the…