I140, NIW approved in Feb. 2005
I485s submitted in Apr. 2005
1st FP in Jul. 2005
VSC -> TSC in Mar. 2007
2nd FP in May 2007
最近又给USCIS打电话，得一回信：
"The processing of your petition/application has been delayed. All petitions/applications received by this Service are required to have routine security checks that are resulting in delays of adjudication of petitions/applications. We can give no definite indication of when they will be completed. We apologize for the delay."
看来是苦海无涯。请各位高人分析原因，指点迷津！！