I feel, they must have goofed up singing the National Anthem. When queried by media, NRN must have apologised. Instead he justfied it and gave a lame excuse. Btw, according report, it was only Kalam who sang with enthusiasm.
Though other newspapers reported this, TOI completely ignored this.
More here:
'Jana gana mana' makes foreigners uneasy: NRN « churumuri