The Roger Clemens perjury trial resumes with the final day of testimony from Brian McNamee, the government's key witness.
The top U.S. envoy for North Korea is warning Pyongyang that any nuclear test will be met with "swift and sure" international punishment.
The head of the U.N. nuclear agency arrived Monday in Tehran on a key mission that could lead to the resumption of probes by the watchdog on whether Iran has secretly worked on an atomic weapon.
Overnight clashes in Beirut between Sunni Muslim groups that support and oppose the regime in Damascus left one person dead and 10 wounded as fears rose further of a spillover from the Syrian conflict, Lebanese security officials said Monday.