diff --git a/src/float_ordering.rs b/src/float_ordering.rs
new file mode 100644
index 0000000..bbc0608
--- /dev/null
+++ b/src/float_ordering.rs
@@ -0,0 +1,18 @@
+use std::cmp::Ordering;
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct NonNan(pub f64);
+
+impl Eq for NonNan {}
+
+impl PartialOrd for NonNan {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(other.cmp(self))
+    }
+}
+
+impl Ord for NonNan {
+    fn cmp(&self, other: &NonNan) -> Ordering {
+        self.partial_cmp(other).unwrap()
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index f9e1f74..da1114b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,15 +3,18 @@
 mod airport;
 mod cmd;
 mod distance;
+mod float_ordering;
 mod parse;
 
 use std::{
     cell::RefCell,
     collections::{hash_map::Entry, HashMap},
     env,
+    f64::INFINITY,
     rc::Rc,
 };
 
+use float_ordering::NonNan;
 use parse::Record;
 
 type NodePointer = Rc<RefCell<Node>>;
@@ -23,6 +26,8 @@ struct Node {
     origin: Rc<airport::Airport>,
     destinations: Vec<Destination>,
     visited: bool,
+    source_distance: NonNan,
+    previous_node: Option<NodePointer>,
 }
 
 impl Node {
@@ -31,6 +36,8 @@ impl Node {
             destinations,
             origin,
             visited: false,
+            source_distance: NonNan(INFINITY),
+            previous_node: None,
         }
     }
 }
@@ -134,5 +141,9 @@ fn main() {
     let args: Vec<String> = env::args().collect();
     let (origin_id, destination_id) = cmd::handle_args(args, code_to_id);
 
+    // Fetch target nodes
+    let origin = graph[&origin_id].clone();
+    let destination = graph[&destination_id].clone();
+
     println!("{:#?} {:#?}", graph[&origin_id], graph[&destination_id]);
 }