[Ed note: Maybe his bus tour can be extended to include an inspection of the mass graves]
US President Barack Obama has said the alleged use of chemical weapons in Syria in an attack on Wednesday is a “big event of grave concern”.
Mr Obama said the US was still seeking confirmation such weapons were used, but if proved true the situation would “require America’s attention”.
Meanwhile, Syria’s main ally Russia has urged it to allow a United Nations team to investigate the allegations.
Activists say hundreds died in the alleged chemical attack near Damascus.
The British government believes the regime of President Bashar al-Assad is responsible for the attack, Foreign Secretary William Hague said on Friday.
But despite calls from many different countries, there is no sign yet that Damascus will allow a UN inspection team to visit to investigate the claims.