Today in Pictures: April 18, 2013 Wearing ghilli suits, Iranian army troops march in a parade marking National Army Day in front of the mausoleum of the late revolutionary founder Ayatollah Khomeini, just outside Tehran, Iran, April 18, 2013. Ahead of the parade, Iran's President Mahmoud Ahmadinejad slammed "foreign presence" in the Persian Gulf, claiming it's the source of insecurity in the region. Vahid Salemi/AP