On this day 100 years ago, @usarmy Soldiers began guarding one of our nation's most sacred places, the Tomb of the Unknown Soldier at @ArlingtonNatl. Since March 25, 1926, we have kept the watch to preserve and protect the Tomb, and to pay tribute to those laid to rest there in honored glory.
Afghanistan accused Pakistan of launching an airstrike that killed at least 400 people at a drug treatment hospital, in what could mark a major escalation in fighting between the neighbors https://t.co/LR0zxUNVDW
Where was Pakistan when US troops were in Afghanistan?