A Palestinian gunman on Saturday opened fire in central Tel Aviv, killing an Israeli security guard before he was shot and killed by police, authorities said. The attack came a day after a settler rampage in the occupied West Bank killed one Palestinian, deepening the spiral of violence that has gripped the region for the past year and a half. Late Saturday, officials from Ichilov Hospital identified the Tel Aviv security guard who was killed as 42-year-old Chen Amir. Police identified the...