US Supreme Court chief justice in Malta

Roberts arrived yesterday afternoon, for a two-week stay during which he will be teaching US Constitutional Law to American students.

The US Chief Justice landed in Malta leaving behind him fiery criticism from conservative politicians and pundits after casting the key vote to uphold President Barack Obama's health care law.

Speculation about why Roberts voted with the liberal side of the court reached a fever pitch on Sunday when CBS News reported that Roberts had switched his vote. Roberts has since kept tight-lipped.