US era of strategic patience with North Korea over: Pence
US Vice-President Mike Pence has said his country's era of strategic patience with North Korea is over.
Pence made these remarks during visit to the demilitarised zone in South Korean, which divides the two Koreas.
According to South Korean media reports, the US and South Korea are launching joint air force military exercise to ensure readiness against North Korea from today.
Talking to reporters, Pence said the US wants to achieve security on the Korean peninsula through peaceable means and negotiations but all options are on the table now.