KANSAS CITY, Missouri, July 11 : Argentina coach Lionel Scaloni said their 3-1 extra-time victory over Switzerland in the World Cup quarter-finals on Saturday was further proof that his team have grown comfortable operating in challenging situations.Forced to come from two goals down in their improbable 3-2 round-of-16 win over Egypt, and then pushed to the limit again by a relentless Swiss side, Scaloni's men found answers when the pressure was at its greatest, scoring twice deep in extra time to reach the last four.For Scaloni, the ability to suffer without losing belief has become one of the defining characteristics of this Argentina squad."We knew that we were going to suffer, and this is part of our blood, this is part of our DNA, and this brings peace of mind," the coach said. Argent