In this photo by Wong Maye-E, Indonesian President Joko Widodo, popularly known as "Jokowi," and his wife Iriana congratulate their son Kaesang Pangarep, who received an international baccalaureate diploma at the Anglo Chinese School (International) in Singapore. The president attended Friday's ceremony after flying in economy class on a commercial flight from Jakarta. At the school, he also posed with VIPs and took selfies with other graduates. Cabinet Secretary Andi Widjojanto said Widodo chose not to take the presidential plane because it was a personal trip.