Making a rare public appearance, Marshal of the Indian Air Force Arjan Singh on Tuesday paid his last respects to former president A.P.J. Abdul Kalam.The 96-year-old Arjan Singh, seated on a wheelchair, laid a wreath on the former president's body at the Palam airport where the body was brought from Shillong.President Pranab Mukherjee, Prime Minister Narendra Modi, Defence Minister Manohar Parrikar and three service chiefs also paid their respect to the departed leader here.The mortal remains of the late president were brought by an Indian Air Force (IAF) C-130 J Super Hercules Aircraft.