It seems red flags are repeatedly being missed in regards to the radical Islamic terrorists here in the US.

Looking into the past of Ahmad Rahami, the latest radical Islamic terrorist to carry out a terrorist attack on US soil, he began traveling to Quetta, Pakistan and Afghanistan multiple times over the past several of years. After his trips overseas, his appearance and behavior began to noticeably change according to friends and customers of his family’s restaurant.

Every time he returned to the US, he was sent to secondary screening/questioning by US Customs and Border Protection officers. After questioning, his travel details were entered into a national database and he went on his way back to his life here in the US. Each time he claimed his reason for visiting was to see family members. Pakistan and Afghanistan are both safe havens for the Taliban, al Qaeda, and ISIS. According to the Guardian,

The 28-year-old, who was born in Afghanistan but became a US citizen, spent time at the Kaan Kuwa Naqshbandi madrassa on his two visits to Pakistan, a security official working for the government of Balochistan province told the Guardian.

Rahami spent three weeks in 2011 receiving “lectures and Islamic education” at the school in Kuchlak, a dusty cluster of villages 20km north of Quetta, the provincial capital of Balochistan, he said.

Kuchlak is a well-known hub for the Taliban, the Islamist movement that has waged a 15-year insurgency against local and Nato forces in nearby Afghanistan. It is home to many madrassas, the seminaries intimately linked with the Taliban, originally a movement of religious students.

Here is a brief timeline of his life prior to the terrorist attacks:

1995: Arrived in the US from Afghanistan (age 7)

2011: Became a US citizen (age 23)