by Olivia Hampton   WASHINGTON, United States (AFP)– Justice Antonin Scalia, a towering conservative voice on the US Supreme Court, has died at the age of 79, triggering a political showdown over his succession in the run-up to the presidential election. President Barack Obama ordered flags to fly at half-staff across the United States until the long-serving justice, first appointed by Ronald Reagan in 1986, is laid to rest. Scalia’s death after three decades on the […]