The border guards' job has gotten harder, he says, since Israel began blockading Gaza in June 2007, when Hamas gained control of the coastal strip from forces loyal to Palestinian President Mahmoud Abbas and his Fatah movement based in the West Bank.
The blockade has created shortages of food, medicine, and fuel in Gaza, and has been denounced by Human Rights Watch as an "unlawful" form of "collective punishment."
Colonel Ali says that he believes that until the Israeli blockade ends there is only so much Egypt can do to stem the tide of illegal goods going under the border. "Smuggling will never end," he says. "If the Israelis want the number of smugglers and tunnels to decrease, then they should open Gaza up regularly. We need a legal way to make trade OK."
Still, Egypt has been cracking down on the underground smuggling operation. Early last month, Hamas blamed Egypt for the deaths of eight Palestinians when it used water, gas, and explosives to collapse tunnels under the border.
Smugglers used to bring mainly food and medicine into Gaza, he says, but have since moved on to more profitable, and less humanitarian, forms of contraband. Since 2005, border guards have found hundreds of guns, including 220 AK-47s; 18,465 kilograms of TNT; thousands of bullets; stashes of heroin, marijuana, and hashish; 16,821 packs of cigarettes; and Egyptian, Israeli, Jordanian, American and Saudi currency worth $149,455.