CNN's Arwa Damon reports on the deadliest day in Iraq since the U.S. military handed security over to the Iraqis.
• Security stepped up after Baghdad bombings
# NEW: U.S. commander in charge of training Iraqi security forces is frustrated
# Iraqi government to implement new security measures after bombings in Baghdad
# Measures include additional security checkpoints, more stringent vehicle searches
# Attacks make Wednesday the deadliest day since Iraqis took charge of security
BAGHDAD, Iraq (CNN) -- The Iraqi government implemented new security measures and arrested 11 security officials a day after a string of bombings in Baghdad killed at least 100 people and wounded hundreds more, an interior ministry official told CNN on Thursday.
The measures, ordered by Prime Minister Nuri al-Maliki, include additional security checkpoints across the capital, more stringent vehicle se