Pope Francis admitted on Monday he was frightened by the prospect of an accidental nuclear apocalypse, as he began a weeklong visit to Chile and Peru to bolster a local Catholic Church riven by sex abuse scandals. “I think we are at the very edge,” the pope told reporters aboard his plane when asked about the threat of a nuclear war in the wake of a recent string of tests by North Korea and a false missile alert last week that sparked panic in the US state of Hawaii. “I am really afraid of this. One accident is enough to...