KABUL -  A recent 368-page report by Center for Naval Analyses (CNA), a U.S. based research institute, shows that if the size of the Afghan National Security Forces (ANSF) decreases, Afghanistan could become once again "a safe have for terrorists and insurgents".

This study was recommended by the U.S. Congress and carried out by a Virginia-based nonprofit hired by the Pentagon. The report indicates that Washington and NATO should halt their plans to cut-down the ANSF to 228,000 troops.

"If the U.S. policy goal is to prevent Afghanistan from ever again becoming a safe haven for terrorists and insurgents, drawing down the Afghan Security Forces to 228,000 puts that goal at risk," Director of CNA Strategic Studies Center Jonathan Schroden said.

The report suggests that NATO and the U.S. maintain the current size of ANSF troops-352,000- and pay for the $4.1 million in expenses.

Meanwhile, another report shows that most Americans consider the Afghan war a mistake. A study by Gallup Institute shows that 49 percent of Americans consider the Afghan war a mistake, while another 48 percent who consider the start of the war the right decision.

"Support for the conflict actually grew in January 2002, when 93 percent said the invasion was the right decision," Gallup Institute reported. "Over time support began to drop and by March 2013, 51 percent believed it was not a mistake and 44 percent said it was a mistake."

After 13 years of U.S. presence in Afghanistan, U.S. citizens' views are becoming increasingly negative about the U.S. involvement in the war in Afghanistan.

One of the main reasons behind a lack of interest in the Afghan war is its duration of over 13 years, making it the longest war in U.S. history. (Tolonews)