Making an apology is not an easy thing to do, privately or publicly. Moreover, depending on the society in which they are made and one's position in it, making public apologies can be complicated by cultural and political variables.
Ju, Julian and Power, Mary R.
"Cultural differences in the efficacy of apologies,"
Culture Mandala: The Bulletin of the Centre for East-West Cultural and Economic Studies:
1, Article 4.
Available at: http://epublications.bond.edu.au/cm/vol3/iss1/4